Replace verbatim text with NOT_YET_IMPLEMENTED (#4904)

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## Summary

This PR replaces the `verbatim_text` builder with a `not_yet_implemented` builder that emits `NOT_YET_IMPLEMENTED_<NodeKind>` for not yet implemented nodes. 

The motivation for this change is that partially formatting compound statements can result in incorrectly indented code, which is a syntax error:

```python
def func_no_args():
  a; b; c
  if True: raise RuntimeError
  if False: ...
  for i in range(10):
    print(i)
    continue
```

Get's reformatted to

```python
def func_no_args():
    a; b; c
    if True: raise RuntimeError
    if False: ...
    for i in range(10):
    print(i)
    continue
```

because our formatter does not yet support `for` statements and just inserts the text from the source. 

## Downsides

Using an identifier will not work in all situations. For example, an identifier is invalid in an `Arguments ` position. That's why I kept `verbatim_text` around and e.g. use it in the `Arguments` formatting logic where incorrect indentations are impossible (to my knowledge). Meaning, `verbatim_text` we can opt in to `verbatim_text` when we want to iterate quickly on nodes that we don't want to provide a full implementation yet and using an identifier would be invalid. 

## Upsides

Running this on main discovered stability issues with the newline handling that were previously "hidden" because of the verbatim formatting. I guess that's an upside :)

## Test Plan

None?

crates/ruff_python_formatter/src/builders.rs

@@ -191,16 +191,16 @@ no_leading_newline = 30
 
         assert_eq!(
             &printed,
-            r#"a = 10
+            r#"NOT_YET_IMPLEMENTED_StmtAssign
 
 
-three_leading_newlines = 80
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
-two_leading_newlines = 20
+NOT_YET_IMPLEMENTED_StmtAssign
 
-one_leading_newline = 10
-no_leading_newline = 30"#
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign"#
         );
     }
 
@@ -211,14 +211,14 @@ no_leading_newline = 30"#
 
         assert_eq!(
             &printed,
-            r#"a = 10
+            r#"NOT_YET_IMPLEMENTED_StmtAssign
 
-three_leading_newlines = 80
+NOT_YET_IMPLEMENTED_StmtAssign
 
-two_leading_newlines = 20
+NOT_YET_IMPLEMENTED_StmtAssign
 
-one_leading_newline = 10
-no_leading_newline = 30"#
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign"#
         );
     }
 
@@ -229,11 +229,11 @@ no_leading_newline = 30"#
 
         assert_eq!(
             &printed,
-            r#"a = 10
-three_leading_newlines = 80
-two_leading_newlines = 20
-one_leading_newline = 10
-no_leading_newline = 30"#
+            r#"NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign"#
         );
     }
 }

crates/ruff_python_formatter/src/expression/expr_attribute.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprAttribute;
 
@@ -10,7 +10,7 @@ pub struct FormatExprAttribute;
 
 impl FormatNodeRule<ExprAttribute> for FormatExprAttribute {
     fn fmt_fields(&self, item: &ExprAttribute, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_await.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprAwait;
 
@@ -10,7 +10,7 @@ pub struct FormatExprAwait;
 
 impl FormatNodeRule<ExprAwait> for FormatExprAwait {
     fn fmt_fields(&self, item: &ExprAwait, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_bool_op.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprBoolOp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprBoolOp;
 
 impl FormatNodeRule<ExprBoolOp> for FormatExprBoolOp {
     fn fmt_fields(&self, item: &ExprBoolOp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_call.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprCall;
 
@@ -10,7 +10,7 @@ pub struct FormatExprCall;
 
 impl FormatNodeRule<ExprCall> for FormatExprCall {
     fn fmt_fields(&self, item: &ExprCall, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_compare.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprCompare;
 
@@ -10,7 +10,7 @@ pub struct FormatExprCompare;
 
 impl FormatNodeRule<ExprCompare> for FormatExprCompare {
     fn fmt_fields(&self, item: &ExprCompare, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_constant.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprConstant;
 
@@ -10,7 +10,7 @@ pub struct FormatExprConstant;
 
 impl FormatNodeRule<ExprConstant> for FormatExprConstant {
     fn fmt_fields(&self, item: &ExprConstant, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_dict.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprDict;
 
@@ -10,7 +10,7 @@ pub struct FormatExprDict;
 
 impl FormatNodeRule<ExprDict> for FormatExprDict {
     fn fmt_fields(&self, item: &ExprDict, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_dict_comp.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprDictComp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprDictComp;
 
 impl FormatNodeRule<ExprDictComp> for FormatExprDictComp {
     fn fmt_fields(&self, item: &ExprDictComp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_formatted_value.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprFormattedValue;
 
@@ -10,7 +10,7 @@ pub struct FormatExprFormattedValue;
 
 impl FormatNodeRule<ExprFormattedValue> for FormatExprFormattedValue {
     fn fmt_fields(&self, item: &ExprFormattedValue, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_generator_exp.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprGeneratorExp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprGeneratorExp;
 
 impl FormatNodeRule<ExprGeneratorExp> for FormatExprGeneratorExp {
     fn fmt_fields(&self, item: &ExprGeneratorExp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_if_exp.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprIfExp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprIfExp;
 
 impl FormatNodeRule<ExprIfExp> for FormatExprIfExp {
     fn fmt_fields(&self, item: &ExprIfExp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_joined_str.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprJoinedStr;
 
@@ -10,7 +10,7 @@ pub struct FormatExprJoinedStr;
 
 impl FormatNodeRule<ExprJoinedStr> for FormatExprJoinedStr {
     fn fmt_fields(&self, item: &ExprJoinedStr, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_lambda.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprLambda;
 
@@ -10,7 +10,7 @@ pub struct FormatExprLambda;
 
 impl FormatNodeRule<ExprLambda> for FormatExprLambda {
     fn fmt_fields(&self, item: &ExprLambda, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_list_comp.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprListComp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprListComp;
 
 impl FormatNodeRule<ExprListComp> for FormatExprListComp {
     fn fmt_fields(&self, item: &ExprListComp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_named_expr.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprNamedExpr;
 
@@ -10,7 +10,7 @@ pub struct FormatExprNamedExpr;
 
 impl FormatNodeRule<ExprNamedExpr> for FormatExprNamedExpr {
     fn fmt_fields(&self, item: &ExprNamedExpr, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_set.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprSet;
 
@@ -10,7 +10,7 @@ pub struct FormatExprSet;
 
 impl FormatNodeRule<ExprSet> for FormatExprSet {
     fn fmt_fields(&self, item: &ExprSet, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_set_comp.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprSetComp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprSetComp;
 
 impl FormatNodeRule<ExprSetComp> for FormatExprSetComp {
     fn fmt_fields(&self, item: &ExprSetComp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_slice.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprSlice;
 
@@ -10,7 +10,7 @@ pub struct FormatExprSlice;
 
 impl FormatNodeRule<ExprSlice> for FormatExprSlice {
     fn fmt_fields(&self, item: &ExprSlice, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_starred.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprStarred;
 
@@ -10,7 +10,7 @@ pub struct FormatExprStarred;
 
 impl FormatNodeRule<ExprStarred> for FormatExprStarred {
     fn fmt_fields(&self, item: &ExprStarred, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_subscript.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprSubscript;
 
@@ -10,7 +10,7 @@ pub struct FormatExprSubscript;
 
 impl FormatNodeRule<ExprSubscript> for FormatExprSubscript {
     fn fmt_fields(&self, item: &ExprSubscript, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_tuple.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprTuple;
 
@@ -10,7 +10,7 @@ pub struct FormatExprTuple;
 
 impl FormatNodeRule<ExprTuple> for FormatExprTuple {
     fn fmt_fields(&self, item: &ExprTuple, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_unary_op.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprUnaryOp;
 
@@ -10,7 +10,7 @@ pub struct FormatExprUnaryOp;
 
 impl FormatNodeRule<ExprUnaryOp> for FormatExprUnaryOp {
     fn fmt_fields(&self, item: &ExprUnaryOp, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_yield.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprYield;
 
@@ -10,7 +10,7 @@ pub struct FormatExprYield;
 
 impl FormatNodeRule<ExprYield> for FormatExprYield {
     fn fmt_fields(&self, item: &ExprYield, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/expression/expr_yield_from.rs

@@ -1,7 +1,7 @@
 use crate::expression::parentheses::{
     default_expression_needs_parentheses, NeedsParentheses, Parentheses, Parenthesize,
 };
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExprYieldFrom;
 
@@ -10,7 +10,7 @@ pub struct FormatExprYieldFrom;
 
 impl FormatNodeRule<ExprYieldFrom> for FormatExprYieldFrom {
     fn fmt_fields(&self, item: &ExprYieldFrom, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }
 

crates/ruff_python_formatter/src/lib.rs

@@ -1,22 +1,15 @@
 use anyhow::{anyhow, Context, Result};
-use ruff_text_size::TextRange;
-use rustpython_parser::ast::Mod;
+use ruff_formatter::prelude::*;
+use ruff_formatter::{format, write};
+use ruff_formatter::{Formatted, IndentStyle, Printed, SimpleFormatOptions, SourceCode};
+use ruff_python_ast::node::{AnyNodeRef, AstNode, NodeKind};
+use ruff_python_ast::source_code::{CommentRanges, CommentRangesBuilder, Locator};
+use ruff_text_size::{TextLen, TextRange};
+use rustpython_parser::ast::{Mod, Ranged};
 use rustpython_parser::lexer::lex;
 use rustpython_parser::{parse_tokens, Mode};
 use std::borrow::Cow;
 
-use ruff_formatter::format_element::tag::VerbatimKind;
-use ruff_formatter::formatter::Formatter;
-use ruff_formatter::prelude::{
-    dynamic_text, source_position, source_text_slice, ContainsNewlines, Tag,
-};
-use ruff_formatter::{
-    format, normalize_newlines, write, Buffer, Format, FormatElement, FormatResult, Formatted,
-    IndentStyle, Printed, SimpleFormatOptions, SourceCode,
-};
-use ruff_python_ast::node::AstNode;
-use ruff_python_ast::source_code::{CommentRanges, CommentRangesBuilder, Locator};
-
 use crate::comments::{
     dangling_node_comments, leading_node_comments, trailing_node_comments, Comments,
 };
@@ -142,16 +135,49 @@ pub fn format_node<'a>(
     )
 }
 
+pub(crate) struct NotYetImplemented(NodeKind);
+
+/// Formats a placeholder for nodes that have not yet been implemented
+pub(crate) fn not_yet_implemented<'a, T>(node: T) -> NotYetImplemented
+where
+    T: Into<AnyNodeRef<'a>>,
+{
+    NotYetImplemented(node.into().kind())
+}
+
+impl Format<PyFormatContext<'_>> for NotYetImplemented {
+    fn fmt(&self, f: &mut PyFormatter) -> FormatResult<()> {
+        let text = std::format!("NOT_YET_IMPLEMENTED_{:?}", self.0);
+
+        f.write_element(FormatElement::Tag(Tag::StartVerbatim(
+            tag::VerbatimKind::Verbatim {
+                length: text.text_len(),
+            },
+        )))?;
+
+        f.write_element(FormatElement::DynamicText {
+            text: Box::from(text),
+        })?;
+
+        f.write_element(FormatElement::Tag(Tag::EndVerbatim))?;
+        Ok(())
+    }
+}
+
 pub(crate) struct VerbatimText(TextRange);
 
-pub(crate) const fn verbatim_text(range: TextRange) -> VerbatimText {
-    VerbatimText(range)
+#[allow(unused)]
+pub(crate) fn verbatim_text<T>(item: &T) -> VerbatimText
+where
+    T: Ranged,
+{
+    VerbatimText(item.range())
 }
 
 impl Format<PyFormatContext<'_>> for VerbatimText {
     fn fmt(&self, f: &mut PyFormatter) -> FormatResult<()> {
         f.write_element(FormatElement::Tag(Tag::StartVerbatim(
-            VerbatimKind::Verbatim {
+            tag::VerbatimKind::Verbatim {
                 length: self.0.len(),
             },
         )))?;
@@ -203,8 +229,7 @@ if    True:
 # trailing
 "#;
         let expected = r#"# preceding
-if    True:
-    print( "hi" )
+NOT_YET_IMPLEMENTED_StmtIf
 # trailing
 "#;
         let actual = format_module(input)?.as_code().to_string();

crates/ruff_python_formatter/src/module/mod_expression.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ModExpression;
 
@@ -7,6 +7,6 @@ pub struct FormatModExpression;
 
 impl FormatNodeRule<ModExpression> for FormatModExpression {
     fn fmt_fields(&self, item: &ModExpression, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/module/mod_function_type.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ModFunctionType;
 
@@ -7,6 +7,6 @@ pub struct FormatModFunctionType;
 
 impl FormatNodeRule<ModFunctionType> for FormatModFunctionType {
     fn fmt_fields(&self, item: &ModFunctionType, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/module/mod_interactive.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ModInteractive;
 
@@ -7,6 +7,6 @@ pub struct FormatModInteractive;
 
 impl FormatNodeRule<ModInteractive> for FormatModInteractive {
     fn fmt_fields(&self, item: &ModInteractive, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/alias.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Alias;
 
@@ -7,6 +7,6 @@ pub struct FormatAlias;
 
 impl FormatNodeRule<Alias> for FormatAlias {
     fn fmt_fields(&self, item: &Alias, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/arg.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Arg;
 
@@ -7,6 +7,6 @@ pub struct FormatArg;
 
 impl FormatNodeRule<Arg> for FormatArg {
     fn fmt_fields(&self, item: &Arg, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/arguments.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Arguments;
 
@@ -7,6 +7,6 @@ pub struct FormatArguments;
 
 impl FormatNodeRule<Arguments> for FormatArguments {
     fn fmt_fields(&self, item: &Arguments, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/comprehension.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Comprehension;
 
@@ -7,6 +7,6 @@ pub struct FormatComprehension;
 
 impl FormatNodeRule<Comprehension> for FormatComprehension {
     fn fmt_fields(&self, item: &Comprehension, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/excepthandler_except_handler.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::ExcepthandlerExceptHandler;
 
@@ -11,6 +11,6 @@ impl FormatNodeRule<ExcepthandlerExceptHandler> for FormatExcepthandlerExceptHan
         item: &ExcepthandlerExceptHandler,
         f: &mut PyFormatter,
     ) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/keyword.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Keyword;
 
@@ -7,6 +7,6 @@ pub struct FormatKeyword;
 
 impl FormatNodeRule<Keyword> for FormatKeyword {
     fn fmt_fields(&self, item: &Keyword, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/match_case.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::MatchCase;
 
@@ -7,6 +7,6 @@ pub struct FormatMatchCase;
 
 impl FormatNodeRule<MatchCase> for FormatMatchCase {
     fn fmt_fields(&self, item: &MatchCase, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/type_ignore_type_ignore.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::TypeIgnoreTypeIgnore;
 
@@ -7,6 +7,6 @@ pub struct FormatTypeIgnoreTypeIgnore;
 
 impl FormatNodeRule<TypeIgnoreTypeIgnore> for FormatTypeIgnoreTypeIgnore {
     fn fmt_fields(&self, item: &TypeIgnoreTypeIgnore, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/other/withitem.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::Withitem;
 
@@ -7,6 +7,6 @@ pub struct FormatWithitem;
 
 impl FormatNodeRule<Withitem> for FormatWithitem {
     fn fmt_fields(&self, item: &Withitem, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_as.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchAs;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchAs;
 
 impl FormatNodeRule<PatternMatchAs> for FormatPatternMatchAs {
     fn fmt_fields(&self, item: &PatternMatchAs, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_class.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchClass;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchClass;
 
 impl FormatNodeRule<PatternMatchClass> for FormatPatternMatchClass {
     fn fmt_fields(&self, item: &PatternMatchClass, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_mapping.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchMapping;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchMapping;
 
 impl FormatNodeRule<PatternMatchMapping> for FormatPatternMatchMapping {
     fn fmt_fields(&self, item: &PatternMatchMapping, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_or.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchOr;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchOr;
 
 impl FormatNodeRule<PatternMatchOr> for FormatPatternMatchOr {
     fn fmt_fields(&self, item: &PatternMatchOr, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_sequence.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchSequence;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchSequence;
 
 impl FormatNodeRule<PatternMatchSequence> for FormatPatternMatchSequence {
     fn fmt_fields(&self, item: &PatternMatchSequence, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_singleton.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchSingleton;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchSingleton;
 
 impl FormatNodeRule<PatternMatchSingleton> for FormatPatternMatchSingleton {
     fn fmt_fields(&self, item: &PatternMatchSingleton, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_star.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchStar;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchStar;
 
 impl FormatNodeRule<PatternMatchStar> for FormatPatternMatchStar {
     fn fmt_fields(&self, item: &PatternMatchStar, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/pattern/pattern_match_value.rs

@@ -1,4 +1,4 @@
-use crate::{verbatim_text, FormatNodeRule, PyFormatter};
+use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
 use ruff_formatter::{write, Buffer, FormatResult};
 use rustpython_parser::ast::PatternMatchValue;
 
@@ -7,6 +7,6 @@ pub struct FormatPatternMatchValue;
 
 impl FormatNodeRule<PatternMatchValue> for FormatPatternMatchValue {
     fn fmt_fields(&self, item: &PatternMatchValue, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [verbatim_text(item.range)])
+        write!(f, [not_yet_implemented(item)])
     }
 }

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__attribute_access_on_number_literals_py.snap

@@ -35,10 +35,9 @@ y = 100(no)
 ```diff
 --- Black
 +++ Ruff
-@@ -1,21 +1,21 @@
+@@ -1,22 +1,21 @@
 -x = (123456789).bit_count()
-+x = 123456789 .bit_count()
- x = (123456).__abs__()
+-x = (123456).__abs__()
 -x = (0.1).is_integer()
 -x = (1.0).imag
 -x = (1e1).imag
@@ -53,53 +52,57 @@ y = 100(no)
 -x = 0o777.real
 -x = (0.000000006).hex()
 -x = -100.0000j
-+x = .1.is_integer()
-+x = 1. .imag
-+x = 1E+1.imag
-+x = 1E-1.real
-+x = 123456789.123456789.hex()
-+x = 123456789.123456789E123456789 .real
-+x = 123456789E123456789 .conjugate()
-+x = 123456789J.real
-+x = 123456789.123456789J.__add__(0b1011.bit_length())
-+x = 0XB1ACC.conjugate()
-+x = 0B1011 .conjugate()
-+x = 0O777 .real
-+x = 0.000000006  .hex()
-+x = -100.0000J
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
 -if (10).real:
-+if 10 .real:
-     ...
+-    ...
++NOT_YET_IMPLEMENTED_StmtIf
  
- y = 100[no]
+-y = 100[no]
+-y = 100(no)
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
-x = 123456789 .bit_count()
-x = (123456).__abs__()
-x = .1.is_integer()
-x = 1. .imag
-x = 1E+1.imag
-x = 1E-1.real
-x = 123456789.123456789.hex()
-x = 123456789.123456789E123456789 .real
-x = 123456789E123456789 .conjugate()
-x = 123456789J.real
-x = 123456789.123456789J.__add__(0b1011.bit_length())
-x = 0XB1ACC.conjugate()
-x = 0B1011 .conjugate()
-x = 0O777 .real
-x = 0.000000006  .hex()
-x = -100.0000J
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
-if 10 .real:
-    ...
+NOT_YET_IMPLEMENTED_StmtIf
 
-y = 100[no]
-y = 100(no)
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__beginning_backslash_py.snap

@@ -0,0 +1,40 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/beginning_backslash.py
+---
+## Input
+
+```py
+\
+
+
+
+
+
+print("hello, world")
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1 +1 @@
+-print("hello, world")
++NOT_YET_IMPLEMENTED_ExprCall
+```
+
+## Ruff Output
+
+```py
+NOT_YET_IMPLEMENTED_ExprCall
+```
+
+## Black Output
+
+```py
+print("hello, world")
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__bracketmatch_py.snap

@@ -19,27 +19,22 @@ lambda x=lambda y={1: 3}: y['x':lambda y: {1: 2}]: x
 ```diff
 --- Black
 +++ Ruff
-@@ -1,4 +1,6 @@
+@@ -1,4 +1,3 @@
 -for ((x in {}) or {})["a"] in x:
-+for ((x in {}) or {})['a'] in x:
-     pass
+-    pass
 -pem_spam = lambda l, spam={"x": 3}: not spam.get(l.strip())
 -lambda x=lambda y={1: 3}: y["x" : lambda y: {1: 2}]: x
-+pem_spam = lambda l, spam = {
-+    "x": 3
-+}: not spam.get(l.strip())
-+lambda x=lambda y={1: 3}: y['x':lambda y: {1: 2}]: x
++NOT_YET_IMPLEMENTED_StmtFor
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_ExprLambda
 ```
 
 ## Ruff Output
 
 ```py
-for ((x in {}) or {})['a'] in x:
-    pass
-pem_spam = lambda l, spam = {
-    "x": 3
-}: not spam.get(l.strip())
-lambda x=lambda y={1: 3}: y['x':lambda y: {1: 2}]: x
+NOT_YET_IMPLEMENTED_StmtFor
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_ExprLambda
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__class_blank_parentheses_py.snap

@@ -36,77 +36,64 @@ class NormalClass (
 ```diff
 --- Black
 +++ Ruff
-@@ -1,16 +1,16 @@
+@@ -1,30 +1,16 @@
 -class SimpleClassWithBlankParentheses:
-+class SimpleClassWithBlankParentheses():
-     pass
- 
+-    pass
+-
++NOT_YET_IMPLEMENTED_StmtClassDef
  
 -class ClassWithSpaceParentheses:
-+class ClassWithSpaceParentheses ( ):
-     first_test_data = 90
-     second_test_data = 100
--
-     def test_func(self):
-         return None
+-    first_test_data = 90
+-    second_test_data = 100
+ 
+-    def test_func(self):
+-        return None
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithEmptyFunc(object):
-+
-     def func_with_blank_parentheses():
-         return 5
- 
-@@ -20,11 +20,12 @@
+-class ClassWithEmptyFunc(object):
+-    def func_with_blank_parentheses():
+-        return 5
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- def class_under_the_func_with_blank_parentheses():
+-def public_func_with_blank_parentheses():
+-    return None
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def class_under_the_func_with_blank_parentheses():
 -    class InsideFunc:
-+    class InsideFunc():
-         pass
+-        pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -class NormalClass:
-+class NormalClass (
-+):
-     def func_for_testing(self, first, second):
-         sum = first + second
-         return sum
+-    def func_for_testing(self, first, second):
+-        sum = first + second
+-        return sum
++NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Ruff Output
 
 ```py
-class SimpleClassWithBlankParentheses():
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithSpaceParentheses ( ):
-    first_test_data = 90
-    second_test_data = 100
-    def test_func(self):
-        return None
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithEmptyFunc(object):
-
-    def func_with_blank_parentheses():
-        return 5
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-def public_func_with_blank_parentheses():
-    return None
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def class_under_the_func_with_blank_parentheses():
-    class InsideFunc():
-        pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-class NormalClass (
-):
-    def func_for_testing(self, first, second):
-        sum = first + second
-        return sum
+NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__class_methods_new_line_py.snap

@@ -113,290 +113,259 @@ class ClassWithDecoInitAndVarsAndDocstringWithInner2:
 ```diff
 --- Black
 +++ Ruff
-@@ -17,23 +17,19 @@
- 
- class ClassWithTheDocstringAndInit:
-     """Just a docstring."""
--
-     def __init__(self):
-         pass
+@@ -1,165 +1,61 @@
+-class ClassSimplest:
+-    pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithInitAndVars:
-     cls_var = 100
--
-     def __init__(self):
-         pass
+-class ClassWithSingleField:
+-    a = 1
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithInitAndVarsAndDocstring:
-     """Test class"""
--
-     cls_var = 100
--
-     def __init__(self):
-         pass
- 
-@@ -46,7 +42,6 @@
- 
- class ClassWithDecoInitAndVars:
-     cls_var = 100
--
-     @deco
-     def __init__(self):
-         pass
-@@ -54,9 +49,7 @@
- 
- class ClassWithDecoInitAndVarsAndDocstring:
-     """Test class"""
--
-     cls_var = 100
--
-     @deco
-     def __init__(self):
-         pass
-@@ -70,21 +63,18 @@
- class ClassSimplestWithInnerWithDocstring:
-     class Inner:
-         """Just a docstring."""
--
-         def __init__(self):
-             pass
+-class ClassWithJustTheDocstring:
+-    """Just a docstring."""
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithSingleFieldWithInner:
-     a = 1
--
-     class Inner:
-         pass
+-class ClassWithInit:
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithJustTheDocstringWithInner:
-     """Just a docstring."""
--
-     class Inner:
-         pass
+-class ClassWithTheDocstringAndInit:
+-    """Just a docstring."""
++NOT_YET_IMPLEMENTED_StmtClassDef
  
-@@ -92,29 +82,23 @@
- class ClassWithInitWithInner:
-     class Inner:
-         pass
--
-     def __init__(self):
-         pass
+-    def __init__(self):
+-        pass
+ 
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-class ClassWithInitAndVars:
+-    cls_var = 100
+ 
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithInitAndVarsWithInner:
-     cls_var = 100
--
-     class Inner:
-         pass
--
-     def __init__(self):
-         pass
+-class ClassWithInitAndVarsAndDocstring:
+-    """Test class"""
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-    cls_var = 100
+ 
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class ClassWithInitAndVarsAndDocstringWithInner:
-     """Test class"""
--
-     cls_var = 100
--
-     class Inner:
-         pass
--
-     def __init__(self):
-         pass
+-class ClassWithDecoInit:
+-    @deco
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
-@@ -122,7 +106,6 @@
- class ClassWithDecoInitWithInner:
-     class Inner:
-         pass
--
-     @deco
-     def __init__(self):
-         pass
-@@ -130,10 +113,8 @@
  
- class ClassWithDecoInitAndVarsWithInner:
-     cls_var = 100
--
-     class Inner:
-         pass
--
-     @deco
-     def __init__(self):
-         pass
-@@ -141,12 +122,9 @@
+-class ClassWithDecoInitAndVars:
+-    cls_var = 100
++NOT_YET_IMPLEMENTED_StmtClassDef
  
- class ClassWithDecoInitAndVarsAndDocstringWithInner:
-     """Test class"""
--
-     cls_var = 100
--
-     class Inner:
-         pass
--
-     @deco
-     def __init__(self):
-         pass
-@@ -154,12 +132,9 @@
+-    @deco
+-    def __init__(self):
+-        pass
  
- class ClassWithDecoInitAndVarsAndDocstringWithInner2:
-     """Test class"""
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-class ClassWithDecoInitAndVarsAndDocstring:
+-    """Test class"""
+ 
+-    cls_var = 100
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-    @deco
+-    def __init__(self):
+-        pass
+ 
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-class ClassSimplestWithInner:
+-    class Inner:
+-        pass
+ 
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-class ClassSimplestWithInnerWithDocstring:
+-    class Inner:
+-        """Just a docstring."""
+ 
+-        def __init__(self):
+-            pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-class ClassWithSingleFieldWithInner:
+-    a = 1
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-    class Inner:
+-        pass
+ 
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-class ClassWithJustTheDocstringWithInner:
+-    """Just a docstring."""
+ 
+-    class Inner:
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-class ClassWithInitWithInner:
+-    class Inner:
+-        pass
 -
-     class Inner:
-         pass
+-    def __init__(self):
+-        pass
 -
-     cls_var = 100
 -
-     @deco
-     def __init__(self):
-         pass
+-class ClassWithInitAndVarsWithInner:
+-    cls_var = 100
+-
+-    class Inner:
+-        pass
+-
+-    def __init__(self):
+-        pass
+-
+-
+-class ClassWithInitAndVarsAndDocstringWithInner:
+-    """Test class"""
+-
+-    cls_var = 100
+-
+-    class Inner:
+-        pass
+-
+-    def __init__(self):
+-        pass
+-
+-
+-class ClassWithDecoInitWithInner:
+-    class Inner:
+-        pass
+-
+-    @deco
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-class ClassWithDecoInitAndVarsWithInner:
+-    cls_var = 100
+-
+-    class Inner:
+-        pass
+-
+-    @deco
+-    def __init__(self):
+-        pass
+-
+-
+-class ClassWithDecoInitAndVarsAndDocstringWithInner:
+-    """Test class"""
+-
+-    cls_var = 100
+-
+-    class Inner:
+-        pass
+-
+-    @deco
+-    def __init__(self):
+-        pass
+-
+-
+-class ClassWithDecoInitAndVarsAndDocstringWithInner2:
+-    """Test class"""
+-
+-    class Inner:
+-        pass
+-
+-    cls_var = 100
+-
+-    @deco
+-    def __init__(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Ruff Output
 
 ```py
-class ClassSimplest:
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithSingleField:
-    a = 1
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithJustTheDocstring:
-    """Just a docstring."""
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInit:
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithTheDocstringAndInit:
-    """Just a docstring."""
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInitAndVars:
-    cls_var = 100
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInitAndVarsAndDocstring:
-    """Test class"""
-    cls_var = 100
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInit:
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitAndVars:
-    cls_var = 100
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitAndVarsAndDocstring:
-    """Test class"""
-    cls_var = 100
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassSimplestWithInner:
-    class Inner:
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassSimplestWithInnerWithDocstring:
-    class Inner:
-        """Just a docstring."""
-        def __init__(self):
-            pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithSingleFieldWithInner:
-    a = 1
-    class Inner:
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithJustTheDocstringWithInner:
-    """Just a docstring."""
-    class Inner:
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInitWithInner:
-    class Inner:
-        pass
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInitAndVarsWithInner:
-    cls_var = 100
-    class Inner:
-        pass
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithInitAndVarsAndDocstringWithInner:
-    """Test class"""
-    cls_var = 100
-    class Inner:
-        pass
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitWithInner:
-    class Inner:
-        pass
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitAndVarsWithInner:
-    cls_var = 100
-    class Inner:
-        pass
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitAndVarsAndDocstringWithInner:
-    """Test class"""
-    cls_var = 100
-    class Inner:
-        pass
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDecoInitAndVarsAndDocstringWithInner2:
-    """Test class"""
-    class Inner:
-        pass
-    cls_var = 100
-    @deco
-    def __init__(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__collections_py.snap

@@ -84,9 +84,31 @@ if True:
 ```diff
 --- Black
 +++ Ruff
-@@ -18,44 +18,26 @@
-     xyzzy as magic,
- )
+@@ -1,99 +1,48 @@
+-import core, time, a
++NOT_YET_IMPLEMENTED_StmtImport
+ 
+-from . import A, B, C
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+ # keeps existing trailing comma
+-from foo import (
+-    bar,
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+ # also keeps existing structure
+-from foo import (
+-    baz,
+-    qux,
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+ # `as` works as well
+-from foo import (
+-    xyzzy as magic,
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
 -a = {
 -    1,
@@ -94,15 +116,11 @@ if True:
 -    3,
 -}
 -b = {1, 2, 3}
-+a = {1,2,3,}
-+b = {
-+1,2,
-+     3}
- c = {
-     1,
-     2,
-     3,
- }
+-c = {
+-    1,
+-    2,
+-    3,
+-}
 -x = (1,)
 -y = (narf(),)
 -nested = {
@@ -116,20 +134,27 @@ if True:
 -    "cccccccccccccccccccccccccccccccccccccccc",
 -    (1, 2, 3),
 -    "dddddddddddddddddddddddddddddddddddddddd",
--]
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_ExprDict
++NOT_YET_IMPLEMENTED_ExprDict
++[
++    NOT_YET_IMPLEMENTED_ExprConstant,
++    NOT_YET_IMPLEMENTED_ExprConstant
++    % NOT_YET_IMPLEMENTED_ExprTuple,
+ ]
 -{
 -    "oneple": (1,),
 -}
-+x = 1,
-+y = narf(),
-+nested = {(1,2,3),(4,5,6),}
-+nested_no_trailing_comma = {(1,2,3),(4,5,6)}
-+nested_long_lines = ["aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb", "cccccccccccccccccccccccccccccccccccccccc", (1, 2, 3), "dddddddddddddddddddddddddddddddddddddddd"]
-+{"oneple": (1,),}
- {"oneple": (1,)}
+-{"oneple": (1,)}
 -["ls", "lsoneple/%s" % (foo,)]
-+['ls', 'lsoneple/%s' % (foo,)]
- x = {"oneple": (1,)}
+-x = {"oneple": (1,)}
 -y = {
 -    "oneple": (1,),
 -}
@@ -137,130 +162,112 @@ if True:
 -    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa wraps %s"
 -    % bar
 -)
-+y = {"oneple": (1,),}
-+assert False, ("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa wraps %s" % bar)
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssert
  
  # looping over a 1-tuple should also not get wrapped
- for x in (1,):
-@@ -63,13 +45,9 @@
- for (x,) in (1,), (2,), (3,):
-     pass
+-for x in (1,):
+-    pass
+-for (x,) in (1,), (2,), (3,):
+-    pass
++NOT_YET_IMPLEMENTED_StmtFor
++NOT_YET_IMPLEMENTED_StmtFor
  
--[
+ [
 -    1,
 -    2,
 -    3,
--]
-+[1, 2, 3]
++    NOT_YET_IMPLEMENTED_ExprConstant,
++    NOT_YET_IMPLEMENTED_ExprConstant,
++    NOT_YET_IMPLEMENTED_ExprConstant,
+ ]
  
 -division_result_tuple = (6 / 2,)
-+division_result_tuple = (6/2,)
- print("foo %r", (foo.bar,))
+-print("foo %r", (foo.bar,))
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_ExprCall
  
- if True:
-@@ -79,21 +57,15 @@
-     )
- 
- if True:
--    ec2client.get_waiter("instance_stopped").wait(
-+    ec2client.get_waiter('instance_stopped').wait(
-         InstanceIds=[instance.id],
-         WaiterConfig={
--            "Delay": 5,
--        },
+-if True:
+-    IGNORED_TYPES_FOR_ATTRIBUTE_CHECKING = (
+-        Config.IGNORED_TYPES_FOR_ATTRIBUTE_CHECKING
+-        | {pylons.controllers.WSGIController}
 -    )
-+            'Delay': 5,
-+        })
-     ec2client.get_waiter("instance_stopped").wait(
-         InstanceIds=[instance.id],
--        WaiterConfig={
--            "Delay": 5,
--        },
-+        WaiterConfig={"Delay": 5,},
-     )
-     ec2client.get_waiter("instance_stopped").wait(
++NOT_YET_IMPLEMENTED_StmtIf
+ 
+-if True:
+-    ec2client.get_waiter("instance_stopped").wait(
 -        InstanceIds=[instance.id],
 -        WaiterConfig={
 -            "Delay": 5,
 -        },
-+        InstanceIds=[instance.id], WaiterConfig={"Delay": 5,},
-     )
+-    )
+-    ec2client.get_waiter("instance_stopped").wait(
+-        InstanceIds=[instance.id],
+-        WaiterConfig={
+-            "Delay": 5,
+-        },
+-    )
+-    ec2client.get_waiter("instance_stopped").wait(
+-        InstanceIds=[instance.id],
+-        WaiterConfig={
+-            "Delay": 5,
+-        },
+-    )
++NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Ruff Output
 
 ```py
-import core, time, a
+NOT_YET_IMPLEMENTED_StmtImport
 
-from . import A, B, C
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
 # keeps existing trailing comma
-from foo import (
-    bar,
-)
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
 # also keeps existing structure
-from foo import (
-    baz,
-    qux,
-)
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
 # `as` works as well
-from foo import (
-    xyzzy as magic,
-)
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-a = {1,2,3,}
-b = {
-1,2,
-     3}
-c = {
-    1,
-    2,
-    3,
-}
-x = 1,
-y = narf(),
-nested = {(1,2,3),(4,5,6),}
-nested_no_trailing_comma = {(1,2,3),(4,5,6)}
-nested_long_lines = ["aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb", "cccccccccccccccccccccccccccccccccccccccc", (1, 2, 3), "dddddddddddddddddddddddddddddddddddddddd"]
-{"oneple": (1,),}
-{"oneple": (1,)}
-['ls', 'lsoneple/%s' % (foo,)]
-x = {"oneple": (1,)}
-y = {"oneple": (1,),}
-assert False, ("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa wraps %s" % bar)
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_ExprDict
+NOT_YET_IMPLEMENTED_ExprDict
+[
+    NOT_YET_IMPLEMENTED_ExprConstant,
+    NOT_YET_IMPLEMENTED_ExprConstant
+    % NOT_YET_IMPLEMENTED_ExprTuple,
+]
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssert
 
 # looping over a 1-tuple should also not get wrapped
-for x in (1,):
-    pass
-for (x,) in (1,), (2,), (3,):
-    pass
+NOT_YET_IMPLEMENTED_StmtFor
+NOT_YET_IMPLEMENTED_StmtFor
 
-[1, 2, 3]
+[
+    NOT_YET_IMPLEMENTED_ExprConstant,
+    NOT_YET_IMPLEMENTED_ExprConstant,
+    NOT_YET_IMPLEMENTED_ExprConstant,
+]
 
-division_result_tuple = (6/2,)
-print("foo %r", (foo.bar,))
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_ExprCall
 
-if True:
-    IGNORED_TYPES_FOR_ATTRIBUTE_CHECKING = (
-        Config.IGNORED_TYPES_FOR_ATTRIBUTE_CHECKING
-        | {pylons.controllers.WSGIController}
-    )
+NOT_YET_IMPLEMENTED_StmtIf
 
-if True:
-    ec2client.get_waiter('instance_stopped').wait(
-        InstanceIds=[instance.id],
-        WaiterConfig={
-            'Delay': 5,
-        })
-    ec2client.get_waiter("instance_stopped").wait(
-        InstanceIds=[instance.id],
-        WaiterConfig={"Delay": 5,},
-    )
-    ec2client.get_waiter("instance_stopped").wait(
-        InstanceIds=[instance.id], WaiterConfig={"Delay": 5,},
-    )
+NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comment_after_escaped_newline_py.snap

@@ -22,32 +22,24 @@ def bobtwo(): \
 ```diff
 --- Black
 +++ Ruff
-@@ -1,6 +1,9 @@
+@@ -1,6 +1,4 @@
 -def bob():  # pylint: disable=W9016
-+def bob(): \
-+         # pylint: disable=W9016
-     pass
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def bobtwo():  # some comment here
-+def bobtwo(): \
-+    \
-+  # some comment here
-     pass
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-def bob(): \
-         # pylint: disable=W9016
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def bobtwo(): \
-    \
-  # some comment here
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments2_py.snap

@@ -178,36 +178,28 @@ instruction()#comment with bad spacing
 ```diff
 --- Black
 +++ Ruff
-@@ -1,39 +1,40 @@
- from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+@@ -1,165 +1,23 @@
+-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
 -    MyLovelyCompanyTeamProjectComponent,  # NOT DRY
-+    MyLovelyCompanyTeamProjectComponent  # NOT DRY
- )
- from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+-)
+-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
 -    MyLovelyCompanyTeamProjectComponent as component,  # DRY
-+    MyLovelyCompanyTeamProjectComponent as component  # DRY
- )
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
  # Please keep __all__ alphabetized within each category.
  
- __all__ = [
-     # Super-special typing primitives.
+-__all__ = [
+-    # Super-special typing primitives.
 -    "Any",
 -    "Callable",
 -    "ClassVar",
-+    'Any',
-+    'Callable',
-+    'ClassVar',
-+
-     # ABCs (from collections.abc).
+-    # ABCs (from collections.abc).
 -    "AbstractSet",  # collections.abc.Set.
 -    "ByteString",
 -    "Container",
-+    'AbstractSet',  # collections.abc.Set.
-+    'ByteString',
-+    'Container',
-+
-     # Concrete collection types.
+-    # Concrete collection types.
 -    "Counter",
 -    "Deque",
 -    "Dict",
@@ -217,59 +209,56 @@ instruction()#comment with bad spacing
 -    "FrozenSet",
 -    "NamedTuple",  # Not really a type.
 -    "Generator",
-+    'Counter',
-+    'Deque',
-+    'Dict',
-+    'DefaultDict',
-+    'List',
-+    'Set',
-+    'FrozenSet',
-+    'NamedTuple',  # Not really a type.
-+    'Generator',
- ]
+-]
++NOT_YET_IMPLEMENTED_StmtAssign
  
- not_shareables = [
-     # singletons
-     True,
-     False,
+-not_shareables = [
+-    # singletons
+-    True,
+-    False,
 -    NotImplemented,
 -    ...,
-+    NotImplemented, ...,
-     # builtin types and objects
-     type,
-     object,
-@@ -48,20 +49,23 @@
-     SubBytes(b"spam"),
- ]
+-    # builtin types and objects
+-    type,
+-    object,
+-    object(),
+-    Exception(),
+-    42,
+-    100.0,
+-    "spam",
+-    # user-defined types and objects
+-    Cheese,
+-    Cheese("Wensleydale"),
+-    SubBytes(b"spam"),
+-]
++NOT_YET_IMPLEMENTED_StmtAssign
  
 -if "PYTHON" in os.environ:
-+if 'PYTHON' in os.environ:
-     add_compiler(compiler_from_env())
- else:
-     # for compiler in compilers.values():
+-    add_compiler(compiler_from_env())
+-else:
+-    # for compiler in compilers.values():
 -    # add_compiler(compiler)
-+         # add_compiler(compiler)
-     add_compiler(compilers[(7.0, 32)])
+-    add_compiler(compilers[(7.0, 32)])
 -    # add_compiler(compilers[(7.1, 64)])
++NOT_YET_IMPLEMENTED_StmtIf
  
  
  # Comment before function.
- def inline_comments_in_brackets_ruin_everything():
-     if typedargslist:
+-def inline_comments_in_brackets_ruin_everything():
+-    if typedargslist:
 -        parameters.children = [children[0], body, children[-1]]  # (1  # )1
-         parameters.children = [
-+            children[0],  # (1
-+            body,
-+            children[-1]  # )1
-+        ]
-+        parameters.children = [
-             children[0],
-             body,
-             children[-1],  # type: ignore
-@@ -73,49 +77,42 @@
-             parameters.children[-1],  # )2
-         ]
-         parameters.children = [parameters.what_if_this_was_actually_long.children[0], body, parameters.children[-1]]  # type: ignore
+-        parameters.children = [
+-            children[0],
+-            body,
+-            children[-1],  # type: ignore
+-        ]
+-    else:
+-        parameters.children = [
+-            parameters.children[0],  # (2 what if this was actually long
+-            body,
+-            parameters.children[-1],  # )2
+-        ]
+-        parameters.children = [parameters.what_if_this_was_actually_long.children[0], body, parameters.children[-1]]  # type: ignore
 -    if (
 -        self._proc is not None
 -        # has the child process finished?
@@ -278,92 +267,74 @@ instruction()#comment with bad spacing
 -        # transport hasn't been notified yet?
 -        and self._proc.poll() is None
 -    ):
-+    if (self._proc is not None
-+            # has the child process finished?
-+            and self._returncode is None
-+            # the child process has finished, but the
-+            # transport hasn't been notified yet?
-+            and self._proc.poll() is None):
-         pass
-     # no newline before or after
-     short = [
+-        pass
+-    # no newline before or after
+-    short = [
 -        # one
 -        1,
 -        # two
 -        2,
 -    ]
-+     # one
-+     1,
-+     # two
-+     2]
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-     # no newline after
+-    # no newline after
 -    call(
 -        arg1,
 -        arg2,
 -        """
-+    call(arg1, arg2, """
- short
+-short
 -""",
 -        arg3=True,
 -    )
-+""", arg3=True)
  
-     ############################################################################
- 
-     call2(
+-    ############################################################################
+-
+-    call2(
 -        # short
 -        arg1,
 -        # but
 -        arg2,
 -        # multiline
 -        """
-+    #short
-+    arg1,
-+    #but
-+    arg2,
-+    #multiline
-+    """
- short
- """,
+-short
+-""",
 -        # yup
 -        arg3=True,
 -    )
-+    # yup
-+    arg3=True)
-     lcomp = [
+-    lcomp = [
 -        element for element in collection if element is not None  # yup  # yup  # right
-+        element  # yup
-+        for element in collection  # yup
-+        if element is not None  # right
-     ]
-     lcomp2 = [
-         # hello
-@@ -127,7 +124,7 @@
-     ]
-     lcomp3 = [
-         # This one is actually too long to fit in a single line.
+-    ]
+-    lcomp2 = [
+-        # hello
+-        element
+-        # yup
+-        for element in collection
+-        # right
+-        if element is not None
+-    ]
+-    lcomp3 = [
+-        # This one is actually too long to fit in a single line.
 -        element.split("\n", 1)[0]
-+        element.split('\n', 1)[0]
-         # yup
-         for element in collection.select_elements()
-         # right
-@@ -140,25 +137,23 @@
-             # and round and round we go
-         # and round and round we go
+-        # yup
+-        for element in collection.select_elements()
+-        # right
+-        if element is not None
+-    ]
+-    while True:
+-        if False:
+-            continue
++NOT_YET_IMPLEMENTED_StmtAssign  # type: Final
+ 
+-            # and round and round we go
+-        # and round and round we go
  
 -    # let's return
-+   # let's return
-     return Node(
-         syms.simple_stmt,
+-    return Node(
+-        syms.simple_stmt,
 -        [Node(statement, result), Leaf(token.NEWLINE, "\n")],  # FIXME: \r\n?
-+        [
-+            Node(statement, result),
-+            Leaf(token.NEWLINE, '\n')  # FIXME: \r\n?
-+        ],
-     )
- 
- 
+-    )
+-
+-
 -CONFIG_FILES = (
 -    [
 -        CONFIG_FILE,
@@ -371,179 +342,50 @@ instruction()#comment with bad spacing
 -    + SHARED_CONFIG_FILES
 -    + USER_CONFIG_FILES
 -)  # type: Final
-+CONFIG_FILES = [CONFIG_FILE, ] + SHARED_CONFIG_FILES + USER_CONFIG_FILES  # type: Final
- 
- 
- class Test:
-     def _init_host(self, parsed) -> None:
+-
+-
+-class Test:
+-    def _init_host(self, parsed) -> None:
 -        if parsed.hostname is None or not parsed.hostname.strip():  # type: ignore
-+        if (parsed.hostname is None or  # type: ignore
-+                not parsed.hostname.strip()):
-             pass
+-            pass
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
+ #######################
+@@ -167,7 +25,7 @@
+ #######################
+ 
+ 
+-instruction()  # comment with bad spacing
++NOT_YET_IMPLEMENTED_ExprCall  # comment with bad spacing
+ 
+ # END COMMENTS
+ # MORE END COMMENTS
 ```
 
 ## Ruff Output
 
 ```py
-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
-    MyLovelyCompanyTeamProjectComponent  # NOT DRY
-)
-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
-    MyLovelyCompanyTeamProjectComponent as component  # DRY
-)
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
 # Please keep __all__ alphabetized within each category.
 
-__all__ = [
-    # Super-special typing primitives.
-    'Any',
-    'Callable',
-    'ClassVar',
+NOT_YET_IMPLEMENTED_StmtAssign
 
-    # ABCs (from collections.abc).
-    'AbstractSet',  # collections.abc.Set.
-    'ByteString',
-    'Container',
+NOT_YET_IMPLEMENTED_StmtAssign
 
-    # Concrete collection types.
-    'Counter',
-    'Deque',
-    'Dict',
-    'DefaultDict',
-    'List',
-    'Set',
-    'FrozenSet',
-    'NamedTuple',  # Not really a type.
-    'Generator',
-]
-
-not_shareables = [
-    # singletons
-    True,
-    False,
-    NotImplemented, ...,
-    # builtin types and objects
-    type,
-    object,
-    object(),
-    Exception(),
-    42,
-    100.0,
-    "spam",
-    # user-defined types and objects
-    Cheese,
-    Cheese("Wensleydale"),
-    SubBytes(b"spam"),
-]
-
-if 'PYTHON' in os.environ:
-    add_compiler(compiler_from_env())
-else:
-    # for compiler in compilers.values():
-         # add_compiler(compiler)
-    add_compiler(compilers[(7.0, 32)])
+NOT_YET_IMPLEMENTED_StmtIf
 
 
 # Comment before function.
-def inline_comments_in_brackets_ruin_everything():
-    if typedargslist:
-        parameters.children = [
-            children[0],  # (1
-            body,
-            children[-1]  # )1
-        ]
-        parameters.children = [
-            children[0],
-            body,
-            children[-1],  # type: ignore
-        ]
-    else:
-        parameters.children = [
-            parameters.children[0],  # (2 what if this was actually long
-            body,
-            parameters.children[-1],  # )2
-        ]
-        parameters.children = [parameters.what_if_this_was_actually_long.children[0], body, parameters.children[-1]]  # type: ignore
-    if (self._proc is not None
-            # has the child process finished?
-            and self._returncode is None
-            # the child process has finished, but the
-            # transport hasn't been notified yet?
-            and self._proc.poll() is None):
-        pass
-    # no newline before or after
-    short = [
-     # one
-     1,
-     # two
-     2]
-
-    # no newline after
-    call(arg1, arg2, """
-short
-""", arg3=True)
-
-    ############################################################################
-
-    call2(
-    #short
-    arg1,
-    #but
-    arg2,
-    #multiline
-    """
-short
-""",
-    # yup
-    arg3=True)
-    lcomp = [
-        element  # yup
-        for element in collection  # yup
-        if element is not None  # right
-    ]
-    lcomp2 = [
-        # hello
-        element
-        # yup
-        for element in collection
-        # right
-        if element is not None
-    ]
-    lcomp3 = [
-        # This one is actually too long to fit in a single line.
-        element.split('\n', 1)[0]
-        # yup
-        for element in collection.select_elements()
-        # right
-        if element is not None
-    ]
-    while True:
-        if False:
-            continue
-
-            # and round and round we go
-        # and round and round we go
-
-   # let's return
-    return Node(
-        syms.simple_stmt,
-        [
-            Node(statement, result),
-            Leaf(token.NEWLINE, '\n')  # FIXME: \r\n?
-        ],
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-CONFIG_FILES = [CONFIG_FILE, ] + SHARED_CONFIG_FILES + USER_CONFIG_FILES  # type: Final
+NOT_YET_IMPLEMENTED_StmtAssign  # type: Final
 
 
-class Test:
-    def _init_host(self, parsed) -> None:
-        if (parsed.hostname is None or  # type: ignore
-                not parsed.hostname.strip()):
-            pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 #######################
@@ -551,7 +393,7 @@ class Test:
 #######################
 
 
-instruction()  # comment with bad spacing
+NOT_YET_IMPLEMENTED_ExprCall  # comment with bad spacing
 
 # END COMMENTS
 # MORE END COMMENTS

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments3_py.snap

@@ -0,0 +1,181 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/comments3.py
+---
+## Input
+
+```py
+# The percent-percent comments are Spyder IDE cells.
+
+
+# %%
+def func():
+    x = """
+    a really long string
+    """
+    lcomp3 = [
+        # This one is actually too long to fit in a single line.
+        element.split("\n", 1)[0]
+        # yup
+        for element in collection.select_elements()
+        # right
+        if element is not None
+    ]
+    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
+    if isinstance(exc_value, MultiError):
+        embedded = []
+        for exc in exc_value.exceptions:
+            if exc not in _seen:
+                embedded.append(
+                    # This should be left alone (before)
+                    traceback.TracebackException.from_exception(
+                        exc,
+                        limit=limit,
+                        lookup_lines=lookup_lines,
+                        capture_locals=capture_locals,
+                        # copy the set of _seen exceptions so that duplicates
+                        # shared between sub-exceptions are not omitted
+                        _seen=set(_seen),
+                    )
+                    # This should be left alone (after)
+                )
+
+    # everything is fine if the expression isn't nested
+    traceback.TracebackException.from_exception(
+        exc,
+        limit=limit,
+        lookup_lines=lookup_lines,
+        capture_locals=capture_locals,
+        # copy the set of _seen exceptions so that duplicates
+        # shared between sub-exceptions are not omitted
+        _seen=set(_seen),
+    )
+
+
+# %%
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -2,47 +2,7 @@
+ 
+ 
+ # %%
+-def func():
+-    x = """
+-    a really long string
+-    """
+-    lcomp3 = [
+-        # This one is actually too long to fit in a single line.
+-        element.split("\n", 1)[0]
+-        # yup
+-        for element in collection.select_elements()
+-        # right
+-        if element is not None
+-    ]
+-    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
+-    if isinstance(exc_value, MultiError):
+-        embedded = []
+-        for exc in exc_value.exceptions:
+-            if exc not in _seen:
+-                embedded.append(
+-                    # This should be left alone (before)
+-                    traceback.TracebackException.from_exception(
+-                        exc,
+-                        limit=limit,
+-                        lookup_lines=lookup_lines,
+-                        capture_locals=capture_locals,
+-                        # copy the set of _seen exceptions so that duplicates
+-                        # shared between sub-exceptions are not omitted
+-                        _seen=set(_seen),
+-                    )
+-                    # This should be left alone (after)
+-                )
+-
+-    # everything is fine if the expression isn't nested
+-    traceback.TracebackException.from_exception(
+-        exc,
+-        limit=limit,
+-        lookup_lines=lookup_lines,
+-        capture_locals=capture_locals,
+-        # copy the set of _seen exceptions so that duplicates
+-        # shared between sub-exceptions are not omitted
+-        _seen=set(_seen),
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+ # %%
+```
+
+## Ruff Output
+
+```py
+# The percent-percent comments are Spyder IDE cells.
+
+
+# %%
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+# %%
+```
+
+## Black Output
+
+```py
+# The percent-percent comments are Spyder IDE cells.
+
+
+# %%
+def func():
+    x = """
+    a really long string
+    """
+    lcomp3 = [
+        # This one is actually too long to fit in a single line.
+        element.split("\n", 1)[0]
+        # yup
+        for element in collection.select_elements()
+        # right
+        if element is not None
+    ]
+    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
+    if isinstance(exc_value, MultiError):
+        embedded = []
+        for exc in exc_value.exceptions:
+            if exc not in _seen:
+                embedded.append(
+                    # This should be left alone (before)
+                    traceback.TracebackException.from_exception(
+                        exc,
+                        limit=limit,
+                        lookup_lines=lookup_lines,
+                        capture_locals=capture_locals,
+                        # copy the set of _seen exceptions so that duplicates
+                        # shared between sub-exceptions are not omitted
+                        _seen=set(_seen),
+                    )
+                    # This should be left alone (after)
+                )
+
+    # everything is fine if the expression isn't nested
+    traceback.TracebackException.from_exception(
+        exc,
+        limit=limit,
+        lookup_lines=lookup_lines,
+        capture_locals=capture_locals,
+        # copy the set of _seen exceptions so that duplicates
+        # shared between sub-exceptions are not omitted
+        _seen=set(_seen),
+    )
+
+
+# %%
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments4_py.snap

@@ -0,0 +1,331 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/comments4.py
+---
+## Input
+
+```py
+from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+    MyLovelyCompanyTeamProjectComponent,  # NOT DRY
+)
+from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+    MyLovelyCompanyTeamProjectComponent as component,  # DRY
+)
+
+
+class C:
+    @pytest.mark.parametrize(
+        ("post_data", "message"),
+        [
+            # metadata_version errors.
+            (
+                {},
+                "None is an invalid value for Metadata-Version. Error: This field is"
+                " required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "-1"},
+                "'-1' is an invalid value for Metadata-Version. Error: Unknown Metadata"
+                " Version see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            # name errors.
+            (
+                {"metadata_version": "1.2"},
+                "'' is an invalid value for Name. Error: This field is required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "1.2", "name": "foo-"},
+                "'foo-' is an invalid value for Name. Error: Must start and end with a"
+                " letter or numeral and contain only ascii numeric and '.', '_' and"
+                " '-'. see https://packaging.python.org/specifications/core-metadata",
+            ),
+            # version errors.
+            (
+                {"metadata_version": "1.2", "name": "example"},
+                "'' is an invalid value for Version. Error: This field is required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "1.2", "name": "example", "version": "dog"},
+                "'dog' is an invalid value for Version. Error: Must start and end with"
+                " a letter or numeral and contain only ascii numeric and '.', '_' and"
+                " '-'. see https://packaging.python.org/specifications/core-metadata",
+            ),
+        ],
+    )
+    def test_fails_invalid_post_data(
+        self, pyramid_config, db_request, post_data, message
+    ):
+        pyramid_config.testing_securitypolicy(userid=1)
+        db_request.POST = MultiDict(post_data)
+
+
+def foo(list_a, list_b):
+    results = (
+        User.query.filter(User.foo == "bar")
+        .filter(  # Because foo.
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+        # Another comment about the filtering on is_quux goes here.
+        .filter(db.not_(User.is_pending.astext.cast(db.Boolean).is_(True)))
+        .order_by(User.created_at.desc())
+        .with_for_update(key_share=True)
+        .all()
+    )
+    return results
+
+
+def foo2(list_a, list_b):
+    # Standalone comment reasonably placed.
+    return (
+        User.query.filter(User.foo == "bar")
+        .filter(
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+    )
+
+
+def foo3(list_a, list_b):
+    return (
+        # Standalone comment but weirdly placed.
+        User.query.filter(User.foo == "bar")
+        .filter(
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+    )
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1,94 +1,14 @@
+-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+-    MyLovelyCompanyTeamProjectComponent,  # NOT DRY
+-)
+-from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+-    MyLovelyCompanyTeamProjectComponent as component,  # DRY
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+ 
+-class C:
+-    @pytest.mark.parametrize(
+-        ("post_data", "message"),
+-        [
+-            # metadata_version errors.
+-            (
+-                {},
+-                "None is an invalid value for Metadata-Version. Error: This field is"
+-                " required. see"
+-                " https://packaging.python.org/specifications/core-metadata",
+-            ),
+-            (
+-                {"metadata_version": "-1"},
+-                "'-1' is an invalid value for Metadata-Version. Error: Unknown Metadata"
+-                " Version see"
+-                " https://packaging.python.org/specifications/core-metadata",
+-            ),
+-            # name errors.
+-            (
+-                {"metadata_version": "1.2"},
+-                "'' is an invalid value for Name. Error: This field is required. see"
+-                " https://packaging.python.org/specifications/core-metadata",
+-            ),
+-            (
+-                {"metadata_version": "1.2", "name": "foo-"},
+-                "'foo-' is an invalid value for Name. Error: Must start and end with a"
+-                " letter or numeral and contain only ascii numeric and '.', '_' and"
+-                " '-'. see https://packaging.python.org/specifications/core-metadata",
+-            ),
+-            # version errors.
+-            (
+-                {"metadata_version": "1.2", "name": "example"},
+-                "'' is an invalid value for Version. Error: This field is required. see"
+-                " https://packaging.python.org/specifications/core-metadata",
+-            ),
+-            (
+-                {"metadata_version": "1.2", "name": "example", "version": "dog"},
+-                "'dog' is an invalid value for Version. Error: Must start and end with"
+-                " a letter or numeral and contain only ascii numeric and '.', '_' and"
+-                " '-'. see https://packaging.python.org/specifications/core-metadata",
+-            ),
+-        ],
+-    )
+-    def test_fails_invalid_post_data(
+-        self, pyramid_config, db_request, post_data, message
+-    ):
+-        pyramid_config.testing_securitypolicy(userid=1)
+-        db_request.POST = MultiDict(post_data)
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-def foo(list_a, list_b):
+-    results = (
+-        User.query.filter(User.foo == "bar")
+-        .filter(  # Because foo.
+-            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+-        )
+-        .filter(User.xyz.is_(None))
+-        # Another comment about the filtering on is_quux goes here.
+-        .filter(db.not_(User.is_pending.astext.cast(db.Boolean).is_(True)))
+-        .order_by(User.created_at.desc())
+-        .with_for_update(key_share=True)
+-        .all()
+-    )
+-    return results
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def foo2(list_a, list_b):
+-    # Standalone comment reasonably placed.
+-    return (
+-        User.query.filter(User.foo == "bar")
+-        .filter(
+-            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+-        )
+-        .filter(User.xyz.is_(None))
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def foo3(list_a, list_b):
+-    return (
+-        # Standalone comment but weirdly placed.
+-        User.query.filter(User.foo == "bar")
+-        .filter(
+-            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+-        )
+-        .filter(User.xyz.is_(None))
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+```
+
+## Ruff Output
+
+```py
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+
+
+NOT_YET_IMPLEMENTED_StmtClassDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+```
+
+## Black Output
+
+```py
+from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+    MyLovelyCompanyTeamProjectComponent,  # NOT DRY
+)
+from com.my_lovely_company.my_lovely_team.my_lovely_project.my_lovely_component import (
+    MyLovelyCompanyTeamProjectComponent as component,  # DRY
+)
+
+
+class C:
+    @pytest.mark.parametrize(
+        ("post_data", "message"),
+        [
+            # metadata_version errors.
+            (
+                {},
+                "None is an invalid value for Metadata-Version. Error: This field is"
+                " required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "-1"},
+                "'-1' is an invalid value for Metadata-Version. Error: Unknown Metadata"
+                " Version see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            # name errors.
+            (
+                {"metadata_version": "1.2"},
+                "'' is an invalid value for Name. Error: This field is required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "1.2", "name": "foo-"},
+                "'foo-' is an invalid value for Name. Error: Must start and end with a"
+                " letter or numeral and contain only ascii numeric and '.', '_' and"
+                " '-'. see https://packaging.python.org/specifications/core-metadata",
+            ),
+            # version errors.
+            (
+                {"metadata_version": "1.2", "name": "example"},
+                "'' is an invalid value for Version. Error: This field is required. see"
+                " https://packaging.python.org/specifications/core-metadata",
+            ),
+            (
+                {"metadata_version": "1.2", "name": "example", "version": "dog"},
+                "'dog' is an invalid value for Version. Error: Must start and end with"
+                " a letter or numeral and contain only ascii numeric and '.', '_' and"
+                " '-'. see https://packaging.python.org/specifications/core-metadata",
+            ),
+        ],
+    )
+    def test_fails_invalid_post_data(
+        self, pyramid_config, db_request, post_data, message
+    ):
+        pyramid_config.testing_securitypolicy(userid=1)
+        db_request.POST = MultiDict(post_data)
+
+
+def foo(list_a, list_b):
+    results = (
+        User.query.filter(User.foo == "bar")
+        .filter(  # Because foo.
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+        # Another comment about the filtering on is_quux goes here.
+        .filter(db.not_(User.is_pending.astext.cast(db.Boolean).is_(True)))
+        .order_by(User.created_at.desc())
+        .with_for_update(key_share=True)
+        .all()
+    )
+    return results
+
+
+def foo2(list_a, list_b):
+    # Standalone comment reasonably placed.
+    return (
+        User.query.filter(User.foo == "bar")
+        .filter(
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+    )
+
+
+def foo3(list_a, list_b):
+    return (
+        # Standalone comment but weirdly placed.
+        User.query.filter(User.foo == "bar")
+        .filter(
+            db.or_(User.field_a.astext.in_(list_a), User.field_b.astext.in_(list_b))
+        )
+        .filter(User.xyz.is_(None))
+    )
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments5_py.snap

@@ -86,91 +86,124 @@ if __name__ == "__main__":
 ```diff
 --- Black
 +++ Ruff
-@@ -1,7 +1,6 @@
- while True:
-     if something.changed:
+@@ -1,61 +1,33 @@
+-while True:
+-    if something.changed:
 -        do.stuff()  # trailing comment
 -        # Comment belongs to the `if` block.
-+        do.stuff()
-     # This one belongs to the `while` block.
- 
-     # Should this one, too?  I guess so.
-@@ -15,7 +14,6 @@
- 
-     # then we do this
-     print(i)
--    # and finally we loop around
- 
- with open(some_temp_file) as f:
-     data = f.read()
-@@ -33,7 +31,6 @@
- # leading function comment
- def wat():
-     ...
--    # trailing function comment
- 
- 
- # SECTION COMMENT
-```
-
-## Ruff Output
-
-```py
-while True:
-    if something.changed:
-        do.stuff()
++while NOT_YET_IMPLEMENTED_ExprConstant:
++    NOT_YET_IMPLEMENTED_StmtIf
      # This one belongs to the `while` block.
  
      # Should this one, too?  I guess so.
  
  # This one is properly standalone now.
  
-for i in range(100):
-    # first we do this
-    if i % 33 == 0:
-        break
+-for i in range(100):
+-    # first we do this
+-    if i % 33 == 0:
+-        break
++NOT_YET_IMPLEMENTED_StmtFor
  
-    # then we do this
-    print(i)
+-    # then we do this
+-    print(i)
+-    # and finally we loop around
++NOT_YET_IMPLEMENTED_StmtWith
  
-with open(some_temp_file) as f:
-    data = f.read()
+-with open(some_temp_file) as f:
+-    data = f.read()
+-
+-try:
+-    with open(some_other_file) as w:
+-        w.write(data)
++NOT_YET_IMPLEMENTED_StmtTry
  
-try:
-    with open(some_other_file) as w:
-        w.write(data)
-
-except OSError:
-    print("problems")
-
-import sys
+-except OSError:
+-    print("problems")
+-
+-import sys
++NOT_YET_IMPLEMENTED_StmtImport
  
  
  # leading function comment
-def wat():
-    ...
+-def wat():
+-    ...
+-    # trailing function comment
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # SECTION COMMENT
  
  
  # leading 1
-@deco1
-# leading 2
-@deco2(with_args=True)
-# leading 3
-@deco3
-def decorated1():
-    ...
+-@deco1
+-# leading 2
+-@deco2(with_args=True)
+-# leading 3
+-@deco3
+-def decorated1():
+-    ...
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # leading 1
-@deco1
-# leading 2
-@deco2(with_args=True)
+-@deco1
+-# leading 2
+-@deco2(with_args=True)
+-# leading function comment
+-def decorated1():
+-    ...
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+ # Note: this is fixed in
+@@ -65,9 +37,7 @@
+ 
+ 
+ # This comment should be split from `some_instruction` by two lines but isn't.
+-def g():
+-    ...
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-if __name__ == "__main__":
+-    main()
++NOT_YET_IMPLEMENTED_StmtIf
+```
+
+## Ruff Output
+
+```py
+while NOT_YET_IMPLEMENTED_ExprConstant:
+    NOT_YET_IMPLEMENTED_StmtIf
+    # This one belongs to the `while` block.
+
+    # Should this one, too?  I guess so.
+
+# This one is properly standalone now.
+
+NOT_YET_IMPLEMENTED_StmtFor
+
+NOT_YET_IMPLEMENTED_StmtWith
+
+NOT_YET_IMPLEMENTED_StmtTry
+
+NOT_YET_IMPLEMENTED_StmtImport
+
+
 # leading function comment
-def decorated1():
-    ...
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+# SECTION COMMENT
+
+
+# leading 1
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+# leading 1
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Note: this is fixed in
@@ -180,12 +213,10 @@ some_instruction
 
 
 # This comment should be split from `some_instruction` by two lines but isn't.
-def g():
-    ...
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-if __name__ == "__main__":
-    main()
+NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments6_py.snap

@@ -131,138 +131,178 @@ aaaaaaaaaaaaa, bbbbbbbbb = map(list, map(itertools.chain.from_iterable, zip(*ite
 ```diff
 --- Black
 +++ Ruff
-@@ -66,7 +66,7 @@
-         + element
-         + another_element
-         + another_element_with_long_name
+@@ -1,118 +1,35 @@
+-from typing import Any, Tuple
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+ 
+-def f(
+-    a,  # type: int
+-):
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+ # test type comments
+-def f(a, b, c, d, e, f, g, h, i):
+-    # type: (int, int, int, int, int, int, int, int, int) -> None
+-    pass
+-
+-
+-def f(
+-    a,  # type: int
+-    b,  # type: int
+-    c,  # type: int
+-    d,  # type: int
+-    e,  # type: int
+-    f,  # type: int
+-    g,  # type: int
+-    h,  # type: int
+-    i,  # type: int
+-):
+-    # type: (...) -> None
+-    pass
+-
+-
+-def f(
+-    arg,  # type: int
+-    *args,  # type: *Any
+-    default=False,  # type: bool
+-    **kwargs,  # type: **Any
+-):
+-    # type: (...) -> None
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def f(
+-    a,  # type: int
+-    b,  # type: int
+-    c,  # type: int
+-    d,  # type: int
+-):
+-    # type: (...) -> None
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    element = 0  # type: int
+-    another_element = 1  # type: float
+-    another_element_with_long_name = 2  # type: int
+-    another_really_really_long_element_with_a_unnecessarily_long_name_to_describe_what_it_does_enterprise_style = (
+-        3
 -    )  # type: int
-+    )
+-    an_element_with_a_long_value = calls() or more_calls() and more()  # type: bool
+ 
+-    tup = (
+-        another_element,
+-        another_really_really_long_element_with_a_unnecessarily_long_name_to_describe_what_it_does_enterprise_style,
+-    )  # type: Tuple[int, int]
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    a = (
+-        element
+-        + another_element
+-        + another_element_with_long_name
+-        + element
+-        + another_element
+-        + another_element_with_long_name
+-    )  # type: int
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def f(
+-    x,  # not a type comment
+-    y,  # type: int
+-):
+-    # type: (...) -> None
+-    pass
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def f(
+-    x,  # not a type comment
+-):  # type: (int) -> None
+-    pass
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def func(
+-    a=some_list[0],  # type: int
+-):  # type: () -> int
+-    c = call(
+-        0.0123,
+-        0.0456,
+-        0.0789,
+-        0.0123,
+-        0.0456,
+-        0.0789,
+-        0.0123,
+-        0.0456,
+-        0.0789,
+-        a[-1],  # type: ignore
+-    )
+ 
+-    c = call(
+-        "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa"  # type: ignore
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def f(
+-result = (  # aaa
+-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+-)
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+-AAAAAAAAAAAAA = [AAAAAAAAAAAAA] + SHARED_AAAAAAAAAAAAA + USER_AAAAAAAAAAAAA + AAAAAAAAAAAAA  # type: ignore
++NOT_YET_IMPLEMENTED_StmtAssign  # type: ignore
+ 
+-call_to_some_function_asdf(
+-    foo,
+-    [AAAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAAA, BBBBBBBBBBBB],  # type: ignore
+-)
++NOT_YET_IMPLEMENTED_ExprCall
+ 
+-aaaaaaaaaaaaa, bbbbbbbbb = map(list, map(itertools.chain.from_iterable, zip(*items)))  # type: ignore[arg-type]
++NOT_YET_IMPLEMENTED_StmtAssign  # type: ignore[arg-type]
 ```
 
 ## Ruff Output
 
 ```py
-from typing import Any, Tuple
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
 
-def f(
-    a,  # type: int
-):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # test type comments
-def f(a, b, c, d, e, f, g, h, i):
-    # type: (int, int, int, int, int, int, int, int, int) -> None
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-    a,  # type: int
-    b,  # type: int
-    c,  # type: int
-    d,  # type: int
-    e,  # type: int
-    f,  # type: int
-    g,  # type: int
-    h,  # type: int
-    i,  # type: int
-):
-    # type: (...) -> None
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-    arg,  # type: int
-    *args,  # type: *Any
-    default=False,  # type: bool
-    **kwargs,  # type: **Any
-):
-    # type: (...) -> None
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-    a,  # type: int
-    b,  # type: int
-    c,  # type: int
-    d,  # type: int
-):
-    # type: (...) -> None
-
-    element = 0  # type: int
-    another_element = 1  # type: float
-    another_element_with_long_name = 2  # type: int
-    another_really_really_long_element_with_a_unnecessarily_long_name_to_describe_what_it_does_enterprise_style = (
-        3
-    )  # type: int
-    an_element_with_a_long_value = calls() or more_calls() and more()  # type: bool
-
-    tup = (
-        another_element,
-        another_really_really_long_element_with_a_unnecessarily_long_name_to_describe_what_it_does_enterprise_style,
-    )  # type: Tuple[int, int]
-
-    a = (
-        element
-        + another_element
-        + another_element_with_long_name
-        + element
-        + another_element
-        + another_element_with_long_name
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-    x,  # not a type comment
-    y,  # type: int
-):
-    # type: (...) -> None
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-    x,  # not a type comment
-):  # type: (int) -> None
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def func(
-    a=some_list[0],  # type: int
-):  # type: () -> int
-    c = call(
-        0.0123,
-        0.0456,
-        0.0789,
-        0.0123,
-        0.0456,
-        0.0789,
-        0.0123,
-        0.0456,
-        0.0789,
-        a[-1],  # type: ignore
-    )
-
-    c = call(
-        "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa", "aaaaaaaa"  # type: ignore
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-result = (  # aaa
-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-)
+NOT_YET_IMPLEMENTED_StmtAssign
 
-AAAAAAAAAAAAA = [AAAAAAAAAAAAA] + SHARED_AAAAAAAAAAAAA + USER_AAAAAAAAAAAAA + AAAAAAAAAAAAA  # type: ignore
+NOT_YET_IMPLEMENTED_StmtAssign  # type: ignore
 
-call_to_some_function_asdf(
-    foo,
-    [AAAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAAA, BBBBBBBBBBBB],  # type: ignore
-)
+NOT_YET_IMPLEMENTED_ExprCall
 
-aaaaaaaaaaaaa, bbbbbbbbb = map(list, map(itertools.chain.from_iterable, zip(*items)))  # type: ignore[arg-type]
+NOT_YET_IMPLEMENTED_StmtAssign  # type: ignore[arg-type]
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments9_py.snap

@@ -152,60 +152,195 @@ def bar():
 ```diff
 --- Black
 +++ Ruff
-@@ -35,9 +35,10 @@
+@@ -1,161 +1,90 @@
+ # Test for https://github.com/psf/black/issues/246.
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
  
  
- some = statement
--# This should be stick to the statement above
+ # This comment should be split from the statement above by two lines.
+-def function():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
-+# This should be stick to the statement above
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # This multiline comments section
+ # should be split from the statement
+ # above by two lines.
+-def function():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # This comment should be split from the statement above by two lines.
+-async def async_function():
+-    pass
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # This comment should be split from the statement above by two lines.
+-class MyClass:
+-    pass
++NOT_YET_IMPLEMENTED_StmtClassDef
 +
++
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+-some = statement
+ # This should be stick to the statement above
+ 
+-
  # This should be split from the above by two lines
- class MyClassWithComplexLeadingComments:
-     pass
-@@ -102,11 +103,9 @@
-         # Leading comment before inline function
-         def inline():
-             pass
+-class MyClassWithComplexLeadingComments:
+-    pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-class ClassWithDocstring:
+-    """A docstring."""
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+ # Leading comment after a class with just a docstring
+-class MyClassAfterAnotherClassWithDocstring:
+-    pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # leading 1
+-@deco1
+-# leading 2
+-# leading 2 extra
+-@deco2(with_args=True)
+-# leading 3
+-@deco3
+-# leading 4
+-def decorated():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # leading 1
+-@deco1
+-# leading 2
+-@deco2(with_args=True)
 -
-         # Another leading comment
-         def another_inline():
-             pass
+-# leading 3 that already has an empty line
+-@deco3
+-# leading 4
+-def decorated_with_split_leading_comments():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-some = statement
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # leading 1
+-@deco1
+-# leading 2
+-@deco2(with_args=True)
+-# leading 3
+-@deco3
 -
-     else:
-         # More leading comments
-         def inline_after_else():
-@@ -117,11 +116,9 @@
-     # Leading comment before "top-level inline" function
-     def top_level_quote_inline():
-         pass
+-# leading 4 that already has an empty line
+-def decorated_with_split_leading_comments():
+-    pass
 -
-     # Another leading comment
-     def another_top_level_quote_inline_inline():
-         pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def main():
+-    if a:
+-        # Leading comment before inline function
+-        def inline():
+-            pass
+ 
+-        # Another leading comment
+-        def another_inline():
+-            pass
 -
- else:
-     # More leading comments
-     def top_level_quote_inline_after_else():
-@@ -138,7 +135,6 @@
+-    else:
+-        # More leading comments
+-        def inline_after_else():
+-            pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-if a:
+-    # Leading comment before "top-level inline" function
+-    def top_level_quote_inline():
+-        pass
++NOT_YET_IMPLEMENTED_StmtIf
+ 
+-    # Another leading comment
+-    def another_top_level_quote_inline_inline():
+-        pass
+ 
+-else:
+-    # More leading comments
+-    def top_level_quote_inline_after_else():
+-        pass
+-
+-
+-class MyClass:
+-    # First method has no empty lines between bare class def.
+-    # More comments.
+-    def first_method(self):
+-        pass
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
  # Regression test for https://github.com/psf/black/issues/3454.
- def foo():
-     pass
+-def foo():
+-    pass
 -    # Trailing comment that belongs to this function
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-@decorator1
+-@decorator2  # fmt: skip
+-def bar():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- @decorator1
-@@ -150,9 +146,6 @@
  # Regression test for https://github.com/psf/black/issues/3454.
- def foo():
-     pass
+-def foo():
+-    pass
 -    # Trailing comment that belongs to this function.
 -    # NOTE this comment only has one empty line below, and the formatter
 -    # should enforce two blank lines.
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- @decorator1
+-@decorator1
+-# A standalone comment
+-def bar():
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
@@ -213,158 +348,94 @@ def bar():
 ```py
 # Test for https://github.com/psf/black/issues/246.
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # This comment should be split from the statement above by two lines.
-def function():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # This multiline comments section
 # should be split from the statement
 # above by two lines.
-def function():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # This comment should be split from the statement above by two lines.
-async def async_function():
-    pass
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # This comment should be split from the statement above by two lines.
-class MyClass:
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # This should be stick to the statement above
 
 # This should be split from the above by two lines
-class MyClassWithComplexLeadingComments:
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class ClassWithDocstring:
-    """A docstring."""
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 # Leading comment after a class with just a docstring
-class MyClassAfterAnotherClassWithDocstring:
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # leading 1
-@deco1
-# leading 2
-# leading 2 extra
-@deco2(with_args=True)
-# leading 3
-@deco3
-# leading 4
-def decorated():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # leading 1
-@deco1
-# leading 2
-@deco2(with_args=True)
-
-# leading 3 that already has an empty line
-@deco3
-# leading 4
-def decorated_with_split_leading_comments():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-some = statement
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # leading 1
-@deco1
-# leading 2
-@deco2(with_args=True)
-# leading 3
-@deco3
-
-# leading 4 that already has an empty line
-def decorated_with_split_leading_comments():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def main():
-    if a:
-        # Leading comment before inline function
-        def inline():
-            pass
-        # Another leading comment
-        def another_inline():
-            pass
-    else:
-        # More leading comments
-        def inline_after_else():
-            pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-if a:
-    # Leading comment before "top-level inline" function
-    def top_level_quote_inline():
-        pass
-    # Another leading comment
-    def another_top_level_quote_inline_inline():
-        pass
-else:
-    # More leading comments
-    def top_level_quote_inline_after_else():
-        pass
+NOT_YET_IMPLEMENTED_StmtIf
 
 
-class MyClass:
-    # First method has no empty lines between bare class def.
-    # More comments.
-    def first_method(self):
-        pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 # Regression test for https://github.com/psf/black/issues/3454.
-def foo():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-@decorator1
-@decorator2  # fmt: skip
-def bar():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Regression test for https://github.com/psf/black/issues/3454.
-def foo():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-@decorator1
-# A standalone comment
-def bar():
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments_non_breaking_space_py.snap

@@ -32,63 +32,53 @@ def function(a:int=42):
 ```diff
 --- Black
 +++ Ruff
-@@ -1,23 +1,20 @@
+@@ -1,23 +1,11 @@
 -from .config import (
 -    ConfigTypeAttributes,
 -    Int,
 -    Path,  # String,
 -    # DEFAULT_TYPE_ATTRIBUTES,
-+from .config import (  ConfigTypeAttributes,    Int,    Path,    # String,
-+    # DEFAULT_TYPE_ATTRIBUTES,
- )
+-)
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
- result = 1  # A simple comment
+-result = 1  # A simple comment
 -result = (1,)  # Another one
-+result = (    1, )  # Another one
++NOT_YET_IMPLEMENTED_StmtAssign  # A simple comment
++NOT_YET_IMPLEMENTED_StmtAssign  # Another one
  
- result = 1  #  type: ignore
- result = 1  # This comment is talking about type: ignore
- square = Square(4)  #  type: Optional[Square]
+-result = 1  #  type: ignore
+-result = 1  # This comment is talking about type: ignore
+-square = Square(4)  #  type: Optional[Square]
++NOT_YET_IMPLEMENTED_StmtAssign  #  type: ignore
++NOT_YET_IMPLEMENTED_StmtAssign  # This comment is talking about type: ignore
++NOT_YET_IMPLEMENTED_StmtAssign  #  type: Optional[Square]
  
  
 -def function(a: int = 42):
 -    """This docstring is already formatted
 -    a
 -    b
-+def function(a:int=42):
-+    """ This docstring is already formatted
-+       a
-+       b
-     """
+-    """
 -    #    There's a NBSP + 3 spaces before
-+    #    There's a NBSP + 3 spaces before
-     #    And 4 spaces on the next line
-     pass
+-    #    And 4 spaces on the next line
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-from .config import (  ConfigTypeAttributes,    Int,    Path,    # String,
-    # DEFAULT_TYPE_ATTRIBUTES,
-)
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-result = 1  # A simple comment
-result = (    1, )  # Another one
+NOT_YET_IMPLEMENTED_StmtAssign  # A simple comment
+NOT_YET_IMPLEMENTED_StmtAssign  # Another one
 
-result = 1  #  type: ignore
-result = 1  # This comment is talking about type: ignore
-square = Square(4)  #  type: Optional[Square]
+NOT_YET_IMPLEMENTED_StmtAssign  #  type: ignore
+NOT_YET_IMPLEMENTED_StmtAssign  # This comment is talking about type: ignore
+NOT_YET_IMPLEMENTED_StmtAssign  #  type: Optional[Square]
 
 
-def function(a:int=42):
-    """ This docstring is already formatted
-       a
-       b
-    """
-    #    There's a NBSP + 3 spaces before
-    #    And 4 spaces on the next line
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__comments_py.snap

@@ -109,31 +109,107 @@ async def wat():
 ```diff
 --- Black
 +++ Ruff
-@@ -4,10 +4,12 @@
+@@ -4,93 +4,42 @@
  #
  # Has many lines. Many, many lines.
  # Many, many, many lines.
 -"""Module docstring.
-+(
-+    """Module docstring.
++NOT_YET_IMPLEMENTED_ExprConstant
  
- Possibly also many, many lines.
- """
-+)
+-Possibly also many, many lines.
+-"""
++NOT_YET_IMPLEMENTED_StmtImport
++NOT_YET_IMPLEMENTED_StmtImport
  
- import os.path
- import sys
-@@ -19,9 +21,6 @@
-     import fast
- except ImportError:
-     import slow as fast
+-import os.path
+-import sys
+-
+-import a
+-from b.c import X  # some noqa comment
++NOT_YET_IMPLEMENTED_StmtImport
++NOT_YET_IMPLEMENTED_StmtImportFrom  # some noqa comment
+ 
+-try:
+-    import fast
+-except ImportError:
+-    import slow as fast
 -
 -
 -# Some comment before a function.
- y = 1
+-y = 1
++NOT_YET_IMPLEMENTED_StmtTry
++NOT_YET_IMPLEMENTED_StmtAssign
  (
      # some strings
-@@ -93,4 +92,4 @@
+     y  # type: ignore
+ )
+-
+ 
+-def function(default=None):
+-    """Docstring comes first.
+ 
+-    Possibly many lines.
+-    """
+-    # FIXME: Some comment about why this function is crap but still in production.
+-    import inner_imports
+-
+-    if inner_imports.are_evil():
+-        # Explains why we have this if.
+-        # In great detail indeed.
+-        x = X()
+-        return x.method1()  # type: ignore
+-
+-    # This return is also commented for some reason.
+-    return default
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+ # Explains why we use global state.
+-GLOBAL_STATE = {"a": a(1), "b": a(2), "c": a(3)}
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # Another comment!
+ # This time two lines.
+-
+ 
+-class Foo:
+-    """Docstring for class Foo.  Example from Sphinx docs."""
+ 
+-    #: Doc comment for class attribute Foo.bar.
+-    #: It can have multiple lines.
+-    bar = 1
+-
+-    flox = 1.5  #: Doc comment for Foo.flox. One line only.
+-
+-    baz = 2
+-    """Docstring for class attribute Foo.baz."""
+-
+-    def __init__(self):
+-        #: Doc comment for instance attribute qux.
+-        self.qux = 3
+-
+-        self.spam = 4
+-        """Docstring for instance attribute spam."""
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+ 
+ #' <h1>This is pweave!</h1>
+ 
+ 
+-@fast(really=True)
+-async def wat():
+-    # This comment, for some reason \
+-    # contains a trailing backslash.
+-    async with X.open_async() as x:  # Some more comments
+-        result = await x.method1()
+-    # Comment after ending a block.
+-    if result:
+-        print("A OK", file=sys.stdout)
+-        # Comment between things.
+-        print()
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
  
  # Some closing comments.
  # Maybe Vim or Emacs directives for formatting.
@@ -151,90 +227,40 @@ async def wat():
 #
 # Has many lines. Many, many lines.
 # Many, many, many lines.
-(
-    """Module docstring.
+NOT_YET_IMPLEMENTED_ExprConstant
 
-Possibly also many, many lines.
-"""
-)
+NOT_YET_IMPLEMENTED_StmtImport
+NOT_YET_IMPLEMENTED_StmtImport
 
-import os.path
-import sys
+NOT_YET_IMPLEMENTED_StmtImport
+NOT_YET_IMPLEMENTED_StmtImportFrom  # some noqa comment
 
-import a
-from b.c import X  # some noqa comment
-
-try:
-    import fast
-except ImportError:
-    import slow as fast
-y = 1
+NOT_YET_IMPLEMENTED_StmtTry
+NOT_YET_IMPLEMENTED_StmtAssign
 (
     # some strings
     y  # type: ignore
 )
 
 
-def function(default=None):
-    """Docstring comes first.
-
-    Possibly many lines.
-    """
-    # FIXME: Some comment about why this function is crap but still in production.
-    import inner_imports
-
-    if inner_imports.are_evil():
-        # Explains why we have this if.
-        # In great detail indeed.
-        x = X()
-        return x.method1()  # type: ignore
-
-    # This return is also commented for some reason.
-    return default
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Explains why we use global state.
-GLOBAL_STATE = {"a": a(1), "b": a(2), "c": a(3)}
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # Another comment!
 # This time two lines.
 
 
-class Foo:
-    """Docstring for class Foo.  Example from Sphinx docs."""
-
-    #: Doc comment for class attribute Foo.bar.
-    #: It can have multiple lines.
-    bar = 1
-
-    flox = 1.5  #: Doc comment for Foo.flox. One line only.
-
-    baz = 2
-    """Docstring for class attribute Foo.baz."""
-
-    def __init__(self):
-        #: Doc comment for instance attribute qux.
-        self.qux = 3
-
-        self.spam = 4
-        """Docstring for instance attribute spam."""
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 #' <h1>This is pweave!</h1>
 
 
-@fast(really=True)
-async def wat():
-    # This comment, for some reason \
-    # contains a trailing backslash.
-    async with X.open_async() as x:  # Some more comments
-        result = await x.method1()
-    # Comment after ending a block.
-    if result:
-        print("A OK", file=sys.stdout)
-        # Comment between things.
-        print()
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Some closing comments.

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__composition_no_trailing_comma_py.snap

@@ -194,272 +194,195 @@ class C:
 ```diff
 --- Black
 +++ Ruff
-@@ -34,7 +34,7 @@
-         xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
-             push_manager=context.request.resource_manager,
-             max_items_to_push=num_items,
+@@ -1,181 +1 @@
+-class C:
+-    def test(self) -> None:
+-        with patch("black.out", print):
+-            self.assertEqual(
+-                unstyle(str(report)), "1 file reformatted, 1 file failed to reformat."
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "1 file reformatted, 1 file left unchanged, 1 file failed to reformat.",
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "2 files reformatted, 1 file left unchanged, 1 file failed to"
+-                " reformat.",
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "2 files reformatted, 2 files left unchanged, 2 files failed to"
+-                " reformat.",
+-            )
+-            for i in (a,):
+-                if (
+-                    # Rule 1
+-                    i % 2 == 0
+-                    # Rule 2
+-                    and i % 3 == 0
+-                ):
+-                    while (
+-                        # Just a comment
+-                        call()
+-                        # Another
+-                    ):
+-                        print(i)
+-        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
+-            push_manager=context.request.resource_manager,
+-            max_items_to_push=num_items,
 -            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE,
-+            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE
-         ).push(
-             # Only send the first n items.
-             items=items[:num_items]
-@@ -68,7 +68,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        ).push(
+-            # Only send the first n items.
+-            items=items[:num_items]
+-        )
+-        return (
+-            'Utterly failed doctest test for %s\n   File "%s", line %s, in %s\n\n%s'
+-            % (test.name, test.filename, lineno, lname, err)
+-        )
+-
+-    def omitting_trailers(self) -> None:
+-        get_collection(
+-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+-        )[OneLevelIndex]
+-        get_collection(
+-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+-        )[OneLevelIndex][TwoLevelIndex][ThreeLevelIndex][FourLevelIndex]
+-        d[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][
+-            22
+-        ]
+-        assignment = (
+-            some.rather.elaborate.rule() and another.rule.ending_with.index[123]
+-        )
+-
+-    def easy_asserts(self) -> None:
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         } == expected, "Not what we expected"
- 
-         assert expected == {
-@@ -80,7 +80,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        } == expected, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         }, "Not what we expected"
- 
-         assert expected == {
-@@ -92,7 +92,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        }, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         }
- 
-     def tricky_asserts(self) -> None:
-@@ -105,7 +105,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        }
+-
+-    def tricky_asserts(self) -> None:
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         } == expected(
-             value, is_going_to_be="too long to fit in a single line", srsly=True
-         ), "Not what we expected"
-@@ -119,7 +119,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        } == expected(
+-            value, is_going_to_be="too long to fit in a single line", srsly=True
+-        ), "Not what we expected"
+-
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         } == expected, (
-             "Not what we expected and the message is too long to fit in one line"
-         )
-@@ -135,7 +135,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        } == expected, (
+-            "Not what we expected and the message is too long to fit in one line"
+-        )
+-
+-        assert expected(
+-            value, is_going_to_be="too long to fit in a single line", srsly=True
+-        ) == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         }, "Not what we expected"
- 
-         assert expected == {
-@@ -147,7 +147,7 @@
-             key6: value6,
-             key7: value7,
-             key8: value8,
+-        }, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
 -            key9: value9,
-+            key9: value9
-         }, (
-             "Not what we expected and the message is too long to fit in one line"
-             " because it's too long"
-@@ -176,6 +176,6 @@
-                 key6: value6,
-                 key7: value7,
-                 key8: value8,
+-        }, (
+-            "Not what we expected and the message is too long to fit in one line"
+-            " because it's too long"
+-        )
+-
+-        dis_c_instance_method = """\
+-        %3d           0 LOAD_FAST                1 (x)
+-                      2 LOAD_CONST               1 (1)
+-                      4 COMPARE_OP               2 (==)
+-                      6 LOAD_FAST                0 (self)
+-                      8 STORE_ATTR               0 (x)
+-                     10 LOAD_CONST               0 (None)
+-                     12 RETURN_VALUE
+-        """ % (
+-            _C.__init__.__code__.co_firstlineno + 1,
+-        )
+-
+-        assert (
+-            expectedexpectedexpectedexpectedexpectedexpectedexpectedexpectedexpect
+-            == {
+-                key1: value1,
+-                key2: value2,
+-                key3: value3,
+-                key4: value4,
+-                key5: value5,
+-                key6: value6,
+-                key7: value7,
+-                key8: value8,
 -                key9: value9,
-+                key9: value9
-             }
-         )
+-            }
+-        )
++NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Ruff Output
 
 ```py
-class C:
-    def test(self) -> None:
-        with patch("black.out", print):
-            self.assertEqual(
-                unstyle(str(report)), "1 file reformatted, 1 file failed to reformat."
-            )
-            self.assertEqual(
-                unstyle(str(report)),
-                "1 file reformatted, 1 file left unchanged, 1 file failed to reformat.",
-            )
-            self.assertEqual(
-                unstyle(str(report)),
-                "2 files reformatted, 1 file left unchanged, 1 file failed to"
-                " reformat.",
-            )
-            self.assertEqual(
-                unstyle(str(report)),
-                "2 files reformatted, 2 files left unchanged, 2 files failed to"
-                " reformat.",
-            )
-            for i in (a,):
-                if (
-                    # Rule 1
-                    i % 2 == 0
-                    # Rule 2
-                    and i % 3 == 0
-                ):
-                    while (
-                        # Just a comment
-                        call()
-                        # Another
-                    ):
-                        print(i)
-        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
-            push_manager=context.request.resource_manager,
-            max_items_to_push=num_items,
-            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE
-        ).push(
-            # Only send the first n items.
-            items=items[:num_items]
-        )
-        return (
-            'Utterly failed doctest test for %s\n   File "%s", line %s, in %s\n\n%s'
-            % (test.name, test.filename, lineno, lname, err)
-        )
-
-    def omitting_trailers(self) -> None:
-        get_collection(
-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
-        )[OneLevelIndex]
-        get_collection(
-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
-        )[OneLevelIndex][TwoLevelIndex][ThreeLevelIndex][FourLevelIndex]
-        d[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][
-            22
-        ]
-        assignment = (
-            some.rather.elaborate.rule() and another.rule.ending_with.index[123]
-        )
-
-    def easy_asserts(self) -> None:
-        assert {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        } == expected, "Not what we expected"
-
-        assert expected == {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        }, "Not what we expected"
-
-        assert expected == {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        }
-
-    def tricky_asserts(self) -> None:
-        assert {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        } == expected(
-            value, is_going_to_be="too long to fit in a single line", srsly=True
-        ), "Not what we expected"
-
-        assert {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        } == expected, (
-            "Not what we expected and the message is too long to fit in one line"
-        )
-
-        assert expected(
-            value, is_going_to_be="too long to fit in a single line", srsly=True
-        ) == {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        }, "Not what we expected"
-
-        assert expected == {
-            key1: value1,
-            key2: value2,
-            key3: value3,
-            key4: value4,
-            key5: value5,
-            key6: value6,
-            key7: value7,
-            key8: value8,
-            key9: value9
-        }, (
-            "Not what we expected and the message is too long to fit in one line"
-            " because it's too long"
-        )
-
-        dis_c_instance_method = """\
-        %3d           0 LOAD_FAST                1 (x)
-                      2 LOAD_CONST               1 (1)
-                      4 COMPARE_OP               2 (==)
-                      6 LOAD_FAST                0 (self)
-                      8 STORE_ATTR               0 (x)
-                     10 LOAD_CONST               0 (None)
-                     12 RETURN_VALUE
-        """ % (
-            _C.__init__.__code__.co_firstlineno + 1,
-        )
-
-        assert (
-            expectedexpectedexpectedexpectedexpectedexpectedexpectedexpectedexpect
-            == {
-                key1: value1,
-                key2: value2,
-                key3: value3,
-                key4: value4,
-                key5: value5,
-                key6: value6,
-                key7: value7,
-                key8: value8,
-                key9: value9
-            }
-        )
+NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__composition_py.snap

@@ -0,0 +1,574 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/composition.py
+---
+## Input
+
+```py
+class C:
+    def test(self) -> None:
+        with patch("black.out", print):
+            self.assertEqual(
+                unstyle(str(report)), "1 file reformatted, 1 file failed to reformat."
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "1 file reformatted, 1 file left unchanged, 1 file failed to reformat.",
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "2 files reformatted, 1 file left unchanged, 1 file failed to"
+                " reformat.",
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "2 files reformatted, 2 files left unchanged, 2 files failed to"
+                " reformat.",
+            )
+            for i in (a,):
+                if (
+                    # Rule 1
+                    i % 2 == 0
+                    # Rule 2
+                    and i % 3 == 0
+                ):
+                    while (
+                        # Just a comment
+                        call()
+                        # Another
+                    ):
+                        print(i)
+        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
+            push_manager=context.request.resource_manager,
+            max_items_to_push=num_items,
+            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE,
+        ).push(
+            # Only send the first n items.
+            items=items[:num_items]
+        )
+        return (
+            'Utterly failed doctest test for %s\n   File "%s", line %s, in %s\n\n%s'
+            % (test.name, test.filename, lineno, lname, err)
+        )
+
+    def omitting_trailers(self) -> None:
+        get_collection(
+            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+        )[OneLevelIndex]
+        get_collection(
+            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+        )[OneLevelIndex][TwoLevelIndex][ThreeLevelIndex][FourLevelIndex]
+        d[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][
+            22
+        ]
+        assignment = (
+            some.rather.elaborate.rule() and another.rule.ending_with.index[123]
+        )
+
+    def easy_asserts(self) -> None:
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }
+
+    def tricky_asserts(self) -> None:
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected(
+            value, is_going_to_be="too long to fit in a single line", srsly=True
+        ), "Not what we expected"
+
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected, (
+            "Not what we expected and the message is too long to fit in one line"
+        )
+
+        assert expected(
+            value, is_going_to_be="too long to fit in a single line", srsly=True
+        ) == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, (
+            "Not what we expected and the message is too long to fit in one line"
+            " because it's too long"
+        )
+
+        dis_c_instance_method = """\
+        %3d           0 LOAD_FAST                1 (x)
+                      2 LOAD_CONST               1 (1)
+                      4 COMPARE_OP               2 (==)
+                      6 LOAD_FAST                0 (self)
+                      8 STORE_ATTR               0 (x)
+                     10 LOAD_CONST               0 (None)
+                     12 RETURN_VALUE
+        """ % (
+            _C.__init__.__code__.co_firstlineno + 1,
+        )
+
+        assert (
+            expectedexpectedexpectedexpectedexpectedexpectedexpectedexpectedexpect
+            == {
+                key1: value1,
+                key2: value2,
+                key3: value3,
+                key4: value4,
+                key5: value5,
+                key6: value6,
+                key7: value7,
+                key8: value8,
+                key9: value9,
+            }
+        )
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1,181 +1 @@
+-class C:
+-    def test(self) -> None:
+-        with patch("black.out", print):
+-            self.assertEqual(
+-                unstyle(str(report)), "1 file reformatted, 1 file failed to reformat."
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "1 file reformatted, 1 file left unchanged, 1 file failed to reformat.",
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "2 files reformatted, 1 file left unchanged, 1 file failed to"
+-                " reformat.",
+-            )
+-            self.assertEqual(
+-                unstyle(str(report)),
+-                "2 files reformatted, 2 files left unchanged, 2 files failed to"
+-                " reformat.",
+-            )
+-            for i in (a,):
+-                if (
+-                    # Rule 1
+-                    i % 2 == 0
+-                    # Rule 2
+-                    and i % 3 == 0
+-                ):
+-                    while (
+-                        # Just a comment
+-                        call()
+-                        # Another
+-                    ):
+-                        print(i)
+-        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
+-            push_manager=context.request.resource_manager,
+-            max_items_to_push=num_items,
+-            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE,
+-        ).push(
+-            # Only send the first n items.
+-            items=items[:num_items]
+-        )
+-        return (
+-            'Utterly failed doctest test for %s\n   File "%s", line %s, in %s\n\n%s'
+-            % (test.name, test.filename, lineno, lname, err)
+-        )
+-
+-    def omitting_trailers(self) -> None:
+-        get_collection(
+-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+-        )[OneLevelIndex]
+-        get_collection(
+-            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+-        )[OneLevelIndex][TwoLevelIndex][ThreeLevelIndex][FourLevelIndex]
+-        d[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][
+-            22
+-        ]
+-        assignment = (
+-            some.rather.elaborate.rule() and another.rule.ending_with.index[123]
+-        )
+-
+-    def easy_asserts(self) -> None:
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        } == expected, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        }, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        }
+-
+-    def tricky_asserts(self) -> None:
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        } == expected(
+-            value, is_going_to_be="too long to fit in a single line", srsly=True
+-        ), "Not what we expected"
+-
+-        assert {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        } == expected, (
+-            "Not what we expected and the message is too long to fit in one line"
+-        )
+-
+-        assert expected(
+-            value, is_going_to_be="too long to fit in a single line", srsly=True
+-        ) == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        }, "Not what we expected"
+-
+-        assert expected == {
+-            key1: value1,
+-            key2: value2,
+-            key3: value3,
+-            key4: value4,
+-            key5: value5,
+-            key6: value6,
+-            key7: value7,
+-            key8: value8,
+-            key9: value9,
+-        }, (
+-            "Not what we expected and the message is too long to fit in one line"
+-            " because it's too long"
+-        )
+-
+-        dis_c_instance_method = """\
+-        %3d           0 LOAD_FAST                1 (x)
+-                      2 LOAD_CONST               1 (1)
+-                      4 COMPARE_OP               2 (==)
+-                      6 LOAD_FAST                0 (self)
+-                      8 STORE_ATTR               0 (x)
+-                     10 LOAD_CONST               0 (None)
+-                     12 RETURN_VALUE
+-        """ % (
+-            _C.__init__.__code__.co_firstlineno + 1,
+-        )
+-
+-        assert (
+-            expectedexpectedexpectedexpectedexpectedexpectedexpectedexpectedexpect
+-            == {
+-                key1: value1,
+-                key2: value2,
+-                key3: value3,
+-                key4: value4,
+-                key5: value5,
+-                key6: value6,
+-                key7: value7,
+-                key8: value8,
+-                key9: value9,
+-            }
+-        )
++NOT_YET_IMPLEMENTED_StmtClassDef
+```
+
+## Ruff Output
+
+```py
+NOT_YET_IMPLEMENTED_StmtClassDef
+```
+
+## Black Output
+
+```py
+class C:
+    def test(self) -> None:
+        with patch("black.out", print):
+            self.assertEqual(
+                unstyle(str(report)), "1 file reformatted, 1 file failed to reformat."
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "1 file reformatted, 1 file left unchanged, 1 file failed to reformat.",
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "2 files reformatted, 1 file left unchanged, 1 file failed to"
+                " reformat.",
+            )
+            self.assertEqual(
+                unstyle(str(report)),
+                "2 files reformatted, 2 files left unchanged, 2 files failed to"
+                " reformat.",
+            )
+            for i in (a,):
+                if (
+                    # Rule 1
+                    i % 2 == 0
+                    # Rule 2
+                    and i % 3 == 0
+                ):
+                    while (
+                        # Just a comment
+                        call()
+                        # Another
+                    ):
+                        print(i)
+        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
+            push_manager=context.request.resource_manager,
+            max_items_to_push=num_items,
+            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE,
+        ).push(
+            # Only send the first n items.
+            items=items[:num_items]
+        )
+        return (
+            'Utterly failed doctest test for %s\n   File "%s", line %s, in %s\n\n%s'
+            % (test.name, test.filename, lineno, lname, err)
+        )
+
+    def omitting_trailers(self) -> None:
+        get_collection(
+            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+        )[OneLevelIndex]
+        get_collection(
+            hey_this_is_a_very_long_call, it_has_funny_attributes, really=True
+        )[OneLevelIndex][TwoLevelIndex][ThreeLevelIndex][FourLevelIndex]
+        d[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][
+            22
+        ]
+        assignment = (
+            some.rather.elaborate.rule() and another.rule.ending_with.index[123]
+        )
+
+    def easy_asserts(self) -> None:
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }
+
+    def tricky_asserts(self) -> None:
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected(
+            value, is_going_to_be="too long to fit in a single line", srsly=True
+        ), "Not what we expected"
+
+        assert {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        } == expected, (
+            "Not what we expected and the message is too long to fit in one line"
+        )
+
+        assert expected(
+            value, is_going_to_be="too long to fit in a single line", srsly=True
+        ) == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, "Not what we expected"
+
+        assert expected == {
+            key1: value1,
+            key2: value2,
+            key3: value3,
+            key4: value4,
+            key5: value5,
+            key6: value6,
+            key7: value7,
+            key8: value8,
+            key9: value9,
+        }, (
+            "Not what we expected and the message is too long to fit in one line"
+            " because it's too long"
+        )
+
+        dis_c_instance_method = """\
+        %3d           0 LOAD_FAST                1 (x)
+                      2 LOAD_CONST               1 (1)
+                      4 COMPARE_OP               2 (==)
+                      6 LOAD_FAST                0 (self)
+                      8 STORE_ATTR               0 (x)
+                     10 LOAD_CONST               0 (None)
+                     12 RETURN_VALUE
+        """ % (
+            _C.__init__.__code__.co_firstlineno + 1,
+        )
+
+        assert (
+            expectedexpectedexpectedexpectedexpectedexpectedexpectedexpectedexpect
+            == {
+                key1: value1,
+                key2: value2,
+                key3: value3,
+                key4: value4,
+                key5: value5,
+                key6: value6,
+                key7: value7,
+                key8: value8,
+                key9: value9,
+            }
+        )
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__docstring_no_extra_empty_line_before_eof_py.snap

@@ -0,0 +1,45 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/docstring_no_extra_empty_line_before_eof.py
+---
+## Input
+
+```py
+# Make sure when the file ends with class's docstring,
+# It doesn't add extra blank lines.
+class ClassWithDocstring:
+    """A docstring."""
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1,4 +1,3 @@
+ # Make sure when the file ends with class's docstring,
+ # It doesn't add extra blank lines.
+-class ClassWithDocstring:
+-    """A docstring."""
++NOT_YET_IMPLEMENTED_StmtClassDef
+```
+
+## Ruff Output
+
+```py
+# Make sure when the file ends with class's docstring,
+# It doesn't add extra blank lines.
+NOT_YET_IMPLEMENTED_StmtClassDef
+```
+
+## Black Output
+
+```py
+# Make sure when the file ends with class's docstring,
+# It doesn't add extra blank lines.
+class ClassWithDocstring:
+    """A docstring."""
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__docstring_preview_py.snap

@@ -63,81 +63,98 @@ def single_quote_docstring_over_line_limit2():
 ```diff
 --- Black
 +++ Ruff
-@@ -1,9 +1,11 @@
- def docstring_almost_at_line_limit():
+@@ -1,48 +1,28 @@
+-def docstring_almost_at_line_limit():
 -    """long docstring................................................................."""
-+    """long docstring.................................................................
-+    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def docstring_almost_at_line_limit_with_prefix():
+-def docstring_almost_at_line_limit_with_prefix():
 -    f"""long docstring................................................................"""
-+    f"""long docstring................................................................
-+    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def mulitline_docstring_almost_at_line_limit():
-@@ -45,4 +47,4 @@
+-def mulitline_docstring_almost_at_line_limit():
+-    """long docstring.................................................................
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    ..................................................................................
+-    """
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def mulitline_docstring_almost_at_line_limit_with_prefix():
+-    f"""long docstring................................................................
+ 
+-    ..................................................................................
+-    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def single_quote_docstring_over_line_limit2():
+-def docstring_at_line_limit():
+-    """long docstring................................................................"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def docstring_at_line_limit_with_prefix():
+-    f"""long docstring..............................................................."""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def multiline_docstring_at_line_limit():
+-    """first line-----------------------------------------------------------------------
+-
+-    second line----------------------------------------------------------------------"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def multiline_docstring_at_line_limit_with_prefix():
+-    f"""first line----------------------------------------------------------------------
+-
+-    second line----------------------------------------------------------------------"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def single_quote_docstring_over_line_limit():
 -    "We do not want to put the closing quote on a new line as that is invalid (see GH-3141)."
-+    'We do not want to put the closing quote on a new line as that is invalid (see GH-3141).'
+-
+-
+-def single_quote_docstring_over_line_limit2():
+-    "We do not want to put the closing quote on a new line as that is invalid (see GH-3141)."
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-def docstring_almost_at_line_limit():
-    """long docstring.................................................................
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_almost_at_line_limit_with_prefix():
-    f"""long docstring................................................................
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def mulitline_docstring_almost_at_line_limit():
-    """long docstring.................................................................
-
-    ..................................................................................
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def mulitline_docstring_almost_at_line_limit_with_prefix():
-    f"""long docstring................................................................
-
-    ..................................................................................
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_at_line_limit():
-    """long docstring................................................................"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_at_line_limit_with_prefix():
-    f"""long docstring..............................................................."""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def multiline_docstring_at_line_limit():
-    """first line-----------------------------------------------------------------------
-
-    second line----------------------------------------------------------------------"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def multiline_docstring_at_line_limit_with_prefix():
-    f"""first line----------------------------------------------------------------------
-
-    second line----------------------------------------------------------------------"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def single_quote_docstring_over_line_limit():
-    "We do not want to put the closing quote on a new line as that is invalid (see GH-3141)."
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def single_quote_docstring_over_line_limit2():
-    'We do not want to put the closing quote on a new line as that is invalid (see GH-3141).'
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__docstring_py.snap

@@ -234,86 +234,64 @@ def stable_quote_normalization_with_immediate_inner_single_quote(self):
 ```diff
 --- Black
 +++ Ruff
-@@ -1,83 +1,85 @@
- class MyClass:
-+  """ Multiline
-+  class docstring
-+  """
-+
-+  def method(self):
-     """Multiline
+@@ -1,219 +1,105 @@
+-class MyClass:
+-    """Multiline
 -    class docstring
-+    method docstring
-     """
--
+-    """
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
 -    def method(self):
 -        """Multiline
 -        method docstring
 -        """
 -        pass
-+    pass
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def foo():
+-def foo():
 -    """This is a docstring with
 -    some lines of text here
 -    """
 -    return
-+  """This is a docstring with             
-+  some lines of text here
-+  """
-+  return
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def bar():
+-def bar():
 -    """This is another docstring
 -    with more lines of text
 -    """
 -    return
-+  '''This is another docstring
-+  with more lines of text
-+  '''
-+  return
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def baz():
+-def baz():
 -    '''"This" is a string with some
 -    embedded "quotes"'''
 -    return
-+  '''"This" is a string with some
-+  embedded "quotes"'''
-+  return
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def troz():
+-def troz():
 -    """Indentation with tabs
 -    is just as OK
 -    """
 -    return
-+	'''Indentation with tabs
-+	is just as OK
-+	'''
-+	return
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def zort():
+-def zort():
 -    """Another
 -    multiline
 -    docstring
 -    """
 -    pass
-+        """Another
-+        multiline
-+        docstring
-+        """
-+        pass
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def poit():
+-def poit():
 -    """
 -    Lorem ipsum dolor sit amet.
-+  """
-+  Lorem ipsum dolor sit amet.       
  
 -    Consectetur adipiscing elit:
 -     - sed do eiusmod tempor incididunt ut labore
@@ -323,133 +301,110 @@ def stable_quote_normalization_with_immediate_inner_single_quote(self):
 -     - aliquip ex ea commodo consequat
 -    """
 -    pass
-+  Consectetur adipiscing elit:
-+   - sed do eiusmod tempor incididunt ut labore
-+   - dolore magna aliqua
-+     - enim ad minim veniam
-+     - quis nostrud exercitation ullamco laboris nisi
-+   - aliquip ex ea commodo consequat
-+  """
-+  pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def under_indent():
+-def under_indent():
 -    """
 -      These lines are indented in a way that does not
 -    make sense.
 -    """
 -    pass
-+  """
-+  These lines are indented in a way that does not
-+make sense.
-+  """
-+  pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def over_indent():
+-def over_indent():
 -    """
 -    This has a shallow indent
 -      - But some lines are deeper
 -      - And the closing quote is too deep
-+  """
-+  This has a shallow indent
-+    - But some lines are deeper
-+    - And the closing quote is too deep
-     """
+-    """
 -    pass
-+  pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def single_line():
+-def single_line():
 -    """But with a newline after it!"""
-+    """But with a newline after it!
-+
-+    """
-     pass
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
-@@ -88,25 +90,30 @@
+-def this():
+-    r"""
+-    'hey ho'
+-    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def that():
+-def that():
 -    """ "hey yah" """
-+  """ "hey yah" """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def and_that():
+-def and_that():
 -    """
 -    "hey yah" """
-+  """
-+  "hey yah" """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def and_this():
+-def and_this():
 -    '''
 -    "hey yah"'''
-+  ''' 
-+  "hey yah"'''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def multiline_whitespace():
+-def multiline_whitespace():
 -    """ """
-+    '''
-+    
-+    
-+    
-+    
-+    '''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def oneline_whitespace():
+-def oneline_whitespace():
 -    """ """
-+    '''      '''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def empty():
-@@ -114,12 +121,11 @@
+-def empty():
+-    """"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def single_quotes():
+-def single_quotes():
 -    "testing"
-+    'testing'
- 
+-
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
 -def believe_it_or_not_this_is_in_the_py_stdlib():
 -    '''
 -    "hey yah"'''
-+def believe_it_or_not_this_is_in_the_py_stdlib(): ''' 
-+"hey yah"'''
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def ignored_docstring():
-@@ -128,32 +134,32 @@
+-def ignored_docstring():
+-    """a => \
+-b"""
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def single_line_docstring_with_whitespace():
+-def single_line_docstring_with_whitespace():
 -    """This should be stripped"""
-+    """   This should be stripped """
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def docstring_with_inline_tabs_and_space_indentation():
-     """hey
+-def docstring_with_inline_tabs_and_space_indentation():
+-    """hey
  
-     tab	separated	value
+-    tab	separated	value
 -        tab at start of line and then a tab	separated	value
 -                                multiple tabs at the beginning	and	inline
 -                        mixed tabs and spaces at beginning. next line has mixed tabs and spaces only.
 -
 -    line ends with some tabs
-+    	tab at start of line and then a tab	separated	value
-+    				multiple tabs at the beginning	and	inline
-+    	 	  	mixed tabs and spaces at beginning. next line has mixed tabs and spaces only.
-+    			 	  		
-+    line ends with some tabs		
-     """
+-    """
+-
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- 
- def docstring_with_inline_tabs_and_tab_indentation():
+-def docstring_with_inline_tabs_and_tab_indentation():
 -    """hey
-+	"""hey
  
 -    tab	separated	value
 -            tab at start of line and then a tab	separated	value
@@ -459,296 +414,191 @@ def stable_quote_normalization_with_immediate_inner_single_quote(self):
 -    line ends with some tabs
 -    """
 -    pass
-+	tab	separated	value
-+		tab at start of line and then a tab	separated	value
-+					multiple tabs at the beginning	and	inline
-+		 	  	mixed tabs and spaces at beginning. next line has mixed tabs and spaces only.
-+				 	  		
-+	line ends with some tabs		
-+	"""
-+	pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def backslash_space():
-@@ -161,14 +167,14 @@
+-def backslash_space():
+-    """\ """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def multiline_backslash_1():
+-def multiline_backslash_1():
 -    """
-+  '''
-   hey\there\
+-  hey\there\
 -  \ """
-+  \ '''
- 
- 
- def multiline_backslash_2():
+-
+-
+-def multiline_backslash_2():
 -    """
 -    hey there \ """
-+  '''
-+  hey there \ '''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Regression test for #3425
-@@ -178,8 +184,8 @@
+-def multiline_backslash_really_long_dont_crash():
+-    """
+-    hey there hello guten tag hi hoow are you ola zdravstvuyte ciao como estas ca va \ """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def multiline_backslash_3():
+-def multiline_backslash_3():
 -    """
 -    already escaped \\"""
-+  '''
-+  already escaped \\ '''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def my_god_its_full_of_stars_1():
-@@ -188,7 +194,7 @@
+-def my_god_its_full_of_stars_1():
+-    "I'm sorry Dave\u2001"
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
  
  # the space below is actually a \u2001, removed in output
- def my_god_its_full_of_stars_2():
+-def my_god_its_full_of_stars_2():
 -    "I'm sorry Dave"
-+    "I'm sorry Dave "
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def docstring_almost_at_line_limit():
-@@ -213,7 +219,7 @@
- 
- 
- def stable_quote_normalization_with_immediate_inner_single_quote(self):
--    """'<text here>
-+    ''''<text here>
- 
-     <text here, since without another non-empty line black is stable>
+-def docstring_almost_at_line_limit():
+-    """long docstring................................................................."""
+-
+-
+-def docstring_almost_at_line_limit2():
+-    """long docstring.................................................................
+-
+-    ..................................................................................
 -    """
-+    '''
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def docstring_at_line_limit():
+-    """long docstring................................................................"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def multiline_docstring_at_line_limit():
+-    """first line-----------------------------------------------------------------------
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    second line----------------------------------------------------------------------"""
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def stable_quote_normalization_with_immediate_inner_single_quote(self):
+-    """'<text here>
+ 
+-    <text here, since without another non-empty line black is stable>
+-    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-class MyClass:
-  """ Multiline
-  class docstring
-  """
-
-  def method(self):
-    """Multiline
-    method docstring
-    """
-    pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-def foo():
-  """This is a docstring with             
-  some lines of text here
-  """
-  return
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def bar():
-  '''This is another docstring
-  with more lines of text
-  '''
-  return
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def baz():
-  '''"This" is a string with some
-  embedded "quotes"'''
-  return
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def troz():
-	'''Indentation with tabs
-	is just as OK
-	'''
-	return
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def zort():
-        """Another
-        multiline
-        docstring
-        """
-        pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def poit():
-  """
-  Lorem ipsum dolor sit amet.       
-
-  Consectetur adipiscing elit:
-   - sed do eiusmod tempor incididunt ut labore
-   - dolore magna aliqua
-     - enim ad minim veniam
-     - quis nostrud exercitation ullamco laboris nisi
-   - aliquip ex ea commodo consequat
-  """
-  pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def under_indent():
-  """
-  These lines are indented in a way that does not
-make sense.
-  """
-  pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def over_indent():
-  """
-  This has a shallow indent
-    - But some lines are deeper
-    - And the closing quote is too deep
-    """
-  pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def single_line():
-    """But with a newline after it!
-
-    """
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def this():
-    r"""
-    'hey ho'
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def that():
-  """ "hey yah" """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def and_that():
-  """
-  "hey yah" """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def and_this():
-  ''' 
-  "hey yah"'''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def multiline_whitespace():
-    '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-    '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def oneline_whitespace():
-    '''      '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def empty():
-    """"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def single_quotes():
-    'testing'
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def believe_it_or_not_this_is_in_the_py_stdlib(): ''' 
-"hey yah"'''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def ignored_docstring():
-    """a => \
-b"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def single_line_docstring_with_whitespace():
-    """   This should be stripped """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_with_inline_tabs_and_space_indentation():
-    """hey
-
-    tab	separated	value
-    	tab at start of line and then a tab	separated	value
-    				multiple tabs at the beginning	and	inline
-    	 	  	mixed tabs and spaces at beginning. next line has mixed tabs and spaces only.
-    			 	  		
-    line ends with some tabs		
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_with_inline_tabs_and_tab_indentation():
-	"""hey
-
-	tab	separated	value
-		tab at start of line and then a tab	separated	value
-					multiple tabs at the beginning	and	inline
-		 	  	mixed tabs and spaces at beginning. next line has mixed tabs and spaces only.
-				 	  		
-	line ends with some tabs		
-	"""
-	pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def backslash_space():
-    """\ """
-
-
-def multiline_backslash_1():
-  '''
-  hey\there\
-  \ '''
-
-
-def multiline_backslash_2():
-  '''
-  hey there \ '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Regression test for #3425
-def multiline_backslash_really_long_dont_crash():
-    """
-    hey there hello guten tag hi hoow are you ola zdravstvuyte ciao como estas ca va \ """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def multiline_backslash_3():
-  '''
-  already escaped \\ '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def my_god_its_full_of_stars_1():
-    "I'm sorry Dave\u2001"
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # the space below is actually a \u2001, removed in output
-def my_god_its_full_of_stars_2():
-    "I'm sorry Dave "
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_almost_at_line_limit():
-    """long docstring................................................................."""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_almost_at_line_limit2():
-    """long docstring.................................................................
-
-    ..................................................................................
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_at_line_limit():
-    """long docstring................................................................"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def multiline_docstring_at_line_limit():
-    """first line-----------------------------------------------------------------------
-
-    second line----------------------------------------------------------------------"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def stable_quote_normalization_with_immediate_inner_single_quote(self):
-    ''''<text here>
-
-    <text here, since without another non-empty line black is stable>
-    '''
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__empty_lines_py.snap

@@ -105,162 +105,116 @@ def g():
 ```diff
 --- Black
 +++ Ruff
-@@ -3,9 +3,9 @@
+@@ -1,89 +1,12 @@
+-"""Docstring."""
++NOT_YET_IMPLEMENTED_ExprConstant
+ 
  
  # leading comment
- def f():
+-def f():
 -    NO = ""
 -    SPACE = " "
 -    DOUBLESPACE = "  "
-+    NO = ''
-+    SPACE = ' '
-+    DOUBLESPACE = '  '
+-
+-    t = leaf.type
+-    p = leaf.parent  # trailing comment
+-    v = leaf.value
+-
+-    if t in ALWAYS_NO_SPACE:
+-        pass
+-    if t == token.COMMENT:  # another trailing comment
+-        return DOUBLESPACE
+-
+-    assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
+-
+-    prev = leaf.prev_sibling
+-    if not prev:
+-        prevp = preceding_leaf(p)
+-        if not prevp or prevp.type in OPENING_BRACKETS:
+-            return NO
+-
+-        if prevp.type == token.EQUAL:
+-            if prevp.parent and prevp.parent.type in {
+-                syms.typedargslist,
+-                syms.varargslist,
+-                syms.parameters,
+-                syms.arglist,
+-                syms.argument,
+-            }:
+-                return NO
+-
+-        elif prevp.type == token.DOUBLESTAR:
+-            if prevp.parent and prevp.parent.type in {
+-                syms.typedargslist,
+-                syms.varargslist,
+-                syms.parameters,
+-                syms.arglist,
+-                syms.dictsetmaker,
+-            }:
+-                return NO
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-     t = leaf.type
-     p = leaf.parent  # trailing comment
-@@ -16,14 +16,19 @@
-     if t == token.COMMENT:  # another trailing comment
-         return DOUBLESPACE
  
-+
-     assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
- 
-+
-     prev = leaf.prev_sibling
-     if not prev:
-         prevp = preceding_leaf(p)
-         if not prevp or prevp.type in OPENING_BRACKETS:
-+
-+
-             return NO
- 
-+
-         if prevp.type == token.EQUAL:
-             if prevp.parent and prevp.parent.type in {
-                 syms.typedargslist,
-@@ -48,12 +53,11 @@
  ###############################################################################
  # SECTION BECAUSE SECTIONS
  ###############################################################################
 -
  
- def g():
+-def g():
 -    NO = ""
 -    SPACE = " "
 -    DOUBLESPACE = "  "
-+    NO = ''
-+    SPACE = ' '
-+    DOUBLESPACE = '  '
- 
-     t = leaf.type
-     p = leaf.parent
-@@ -67,7 +71,7 @@
-         return DOUBLESPACE
- 
-     # Another comment because more comments
+-
+-    t = leaf.type
+-    p = leaf.parent
+-    v = leaf.value
+-
+-    # Comment because comments
+-
+-    if t in ALWAYS_NO_SPACE:
+-        pass
+-    if t == token.COMMENT:
+-        return DOUBLESPACE
+-
+-    # Another comment because more comments
 -    assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
-+    assert p is not None, f'INTERNAL ERROR: hand-made leaf without parent: {leaf!r}'
- 
-     prev = leaf.prev_sibling
-     if not prev:
+-
+-    prev = leaf.prev_sibling
+-    if not prev:
+-        prevp = preceding_leaf(p)
+-
+-        if not prevp or prevp.type in OPENING_BRACKETS:
+-            # Start of the line or a bracketed expression.
+-            # More than one line for the comment.
+-            return NO
+-
+-        if prevp.type == token.EQUAL:
+-            if prevp.parent and prevp.parent.type in {
+-                syms.typedargslist,
+-                syms.varargslist,
+-                syms.parameters,
+-                syms.arglist,
+-                syms.argument,
+-            }:
+-                return NO
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-"""Docstring."""
+NOT_YET_IMPLEMENTED_ExprConstant
 
 
 # leading comment
-def f():
-    NO = ''
-    SPACE = ' '
-    DOUBLESPACE = '  '
-
-    t = leaf.type
-    p = leaf.parent  # trailing comment
-    v = leaf.value
-
-    if t in ALWAYS_NO_SPACE:
-        pass
-    if t == token.COMMENT:  # another trailing comment
-        return DOUBLESPACE
-
-
-    assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
-
-
-    prev = leaf.prev_sibling
-    if not prev:
-        prevp = preceding_leaf(p)
-        if not prevp or prevp.type in OPENING_BRACKETS:
-
-
-            return NO
-
-
-        if prevp.type == token.EQUAL:
-            if prevp.parent and prevp.parent.type in {
-                syms.typedargslist,
-                syms.varargslist,
-                syms.parameters,
-                syms.arglist,
-                syms.argument,
-            }:
-                return NO
-
-        elif prevp.type == token.DOUBLESTAR:
-            if prevp.parent and prevp.parent.type in {
-                syms.typedargslist,
-                syms.varargslist,
-                syms.parameters,
-                syms.arglist,
-                syms.dictsetmaker,
-            }:
-                return NO
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 ###############################################################################
 # SECTION BECAUSE SECTIONS
 ###############################################################################
 
-def g():
-    NO = ''
-    SPACE = ' '
-    DOUBLESPACE = '  '
-
-    t = leaf.type
-    p = leaf.parent
-    v = leaf.value
-
-    # Comment because comments
-
-    if t in ALWAYS_NO_SPACE:
-        pass
-    if t == token.COMMENT:
-        return DOUBLESPACE
-
-    # Another comment because more comments
-    assert p is not None, f'INTERNAL ERROR: hand-made leaf without parent: {leaf!r}'
-
-    prev = leaf.prev_sibling
-    if not prev:
-        prevp = preceding_leaf(p)
-
-        if not prevp or prevp.type in OPENING_BRACKETS:
-            # Start of the line or a bracketed expression.
-            # More than one line for the comment.
-            return NO
-
-        if prevp.type == token.EQUAL:
-            if prevp.parent and prevp.parent.type in {
-                syms.typedargslist,
-                syms.varargslist,
-                syms.parameters,
-                syms.arglist,
-                syms.argument,
-            }:
-                return NO
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtonoff2_py.snap

@@ -53,46 +53,67 @@ def test_calculate_fades():
 ```diff
 --- Black
 +++ Ruff
-@@ -3,6 +3,7 @@
- TmSt = 1
- TmEx = 2
+@@ -1,40 +1,26 @@
+-import pytest
++NOT_YET_IMPLEMENTED_StmtImport
  
+-TmSt = 1
+-TmEx = 2
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
 +
+ 
  # fmt: off
  
  # Test data:
-@@ -18,18 +19,22 @@
- def test_fader(test):
-     pass
+ #   Position, Volume, State, TmSt/TmEx/None, [call, [arg1...]]
  
+-@pytest.mark.parametrize('test', [
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 +
- def check_fader(test):
- 
-     pass
- 
 +
- def verify_fader(test):
-   # misaligned comment
-     pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-+
- def verify_fader(test):
-     """Hey, ho."""
-     assert test.passed()
+-    # Test don't manage the volume
+-    [
+-        ('stuff', 'in')
+-    ],
+-])
+-def test_fader(test):
+-    pass
  
-+
- def test_calculate_fades():
-     calcs = [
-         # one is zero/none
+-def check_fader(test):
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    pass
+ 
+-def verify_fader(test):
+-  # misaligned comment
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def verify_fader(test):
+-    """Hey, ho."""
+-    assert test.passed()
+ 
+-def test_calculate_fades():
+-    calcs = [
+-        # one is zero/none
+-        (0, 4, 0, 0, 10,        0, 0, 6, 10),
+-        (None, 4, 0, 0, 10,     0, 0, 6, 10),
+-    ]
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ # fmt: on
 ```
 
 ## Ruff Output
 
 ```py
-import pytest
+NOT_YET_IMPLEMENTED_StmtImport
 
-TmSt = 1
-TmEx = 2
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # fmt: off
@@ -100,38 +121,19 @@ TmEx = 2
 # Test data:
 #   Position, Volume, State, TmSt/TmEx/None, [call, [arg1...]]
 
-@pytest.mark.parametrize('test', [
-
-    # Test don't manage the volume
-    [
-        ('stuff', 'in')
-    ],
-])
-def test_fader(test):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def check_fader(test):
-
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def verify_fader(test):
-  # misaligned comment
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def verify_fader(test):
-    """Hey, ho."""
-    assert test.passed()
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def test_calculate_fades():
-    calcs = [
-        # one is zero/none
-        (0, 4, 0, 0, 10,        0, 0, 6, 10),
-        (None, 4, 0, 0, 10,     0, 0, 6, 10),
-    ]
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 # fmt: on
 ```

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtonoff3_py.snap

@@ -30,36 +30,39 @@ x = [
 ```diff
 --- Black
 +++ Ruff
-@@ -12,4 +12,6 @@
- ]
+@@ -1,15 +1,9 @@
+ # fmt: off
+-x = [
+-    1, 2,
+-    3, 4,
+-]
++NOT_YET_IMPLEMENTED_StmtAssign
+ # fmt: on
+ 
+ # fmt: off
+-x = [
+-    1, 2,
+-    3, 4,
+-]
++NOT_YET_IMPLEMENTED_StmtAssign
  # fmt: on
  
 -x = [1, 2, 3, 4]
-+x = [
-+    1, 2, 3, 4
-+]
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
 # fmt: off
-x = [
-    1, 2,
-    3, 4,
-]
+NOT_YET_IMPLEMENTED_StmtAssign
 # fmt: on
 
 # fmt: off
-x = [
-    1, 2,
-    3, 4,
-]
+NOT_YET_IMPLEMENTED_StmtAssign
 # fmt: on
 
-x = [
-    1, 2, 3, 4
-]
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtonoff4_py.snap

@@ -26,13 +26,16 @@ def f(): pass
 ```diff
 --- Black
 +++ Ruff
-@@ -4,17 +4,11 @@
-     3, 4,
- ])
- # fmt: on
+@@ -1,20 +1,5 @@
+ # fmt: off
+-@test([
+-    1, 2,
+-    3, 4,
+-])
+-# fmt: on
 -def f():
 -    pass
-+def f(): pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -@test(
@@ -45,30 +48,17 @@ def f(): pass
 -)
 -def f():
 -    pass
-+@test([
-+    1, 2,
-+    3, 4,
-+])
-+def f(): pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
 # fmt: off
-@test([
-    1, 2,
-    3, 4,
-])
-# fmt: on
-def f(): pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-@test([
-    1, 2,
-    3, 4,
-])
-def f(): pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtonoff5_py.snap

@@ -97,133 +97,136 @@ elif   unformatted:
 ```diff
 --- Black
 +++ Ruff
-@@ -44,7 +44,7 @@
-         print ( "This won't be formatted" )
-     print ( "This won't be formatted either" )
- else:
+@@ -1,87 +1,29 @@
+ # Regression test for https://github.com/psf/black/issues/3129.
+-setup(
+-    entry_points={
+-        # fmt: off
+-        "console_scripts": [
+-            "foo-bar"
+-            "=foo.bar.:main",
+-        # fmt: on
+-            ]  # Includes an formatted indentation.
+-    },
+-)
++NOT_YET_IMPLEMENTED_ExprCall
+ 
+ 
+ # Regression test for https://github.com/psf/black/issues/2015.
+-run(
+-    # fmt: off
+-    [
+-        "ls",
+-        "-la",
+-    ]
+-    # fmt: on
+-    + path,
+-    check=True,
+-)
++NOT_YET_IMPLEMENTED_ExprCall
+ 
+ 
+ # Regression test for https://github.com/psf/black/issues/3026.
+-def test_func():
+-    # yapf: disable
+-    if  unformatted(  args  ):
+-        return True
+-    # yapf: enable
+-    elif b:
+-        return True
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    return False
+ 
+-
+ # Regression test for https://github.com/psf/black/issues/2567.
+-if True:
+-    # fmt: off
+-    for _ in range( 1 ):
+-    # fmt: on
+-        print ( "This won't be formatted" )
+-    print ( "This won't be formatted either" )
+-else:
 -    print("This will be formatted")
-+    print ( "This will be formatted" )
++NOT_YET_IMPLEMENTED_StmtIf
  
  
  # Regression test for https://github.com/psf/black/issues/3184.
-@@ -61,7 +61,7 @@
-             elif param[0:4] in ("ZZZZ",):
-                 print ( "This won't be formatted either" )
- 
+-class A:
+-    async def call(param):
+-        if param:
+-            # fmt: off
+-            if param[0:4] in (
+-                "ABCD", "EFGH"
+-            )  :
+-                # fmt: on
+-                print ( "This won't be formatted" )
+-
+-            elif param[0:4] in ("ZZZZ",):
+-                print ( "This won't be formatted either" )
+-
 -        print("This will be formatted")
-+        print ( "This will be formatted" )
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
  # Regression test for https://github.com/psf/black/issues/2985.
-@@ -72,10 +72,7 @@
+-class Named(t.Protocol):
+-    # fmt: off
+-    @property
+-    def  this_wont_be_formatted ( self ) -> str: ...
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class Factory(t.Protocol):
+-class Factory(t.Protocol):
 -    def this_will_be_formatted(self, **kwargs) -> Named:
 -        ...
--
--    # fmt: on
-+    def  this_will_be_formatted ( self, **kwargs ) -> Named: ...
++NOT_YET_IMPLEMENTED_StmtClassDef
  
+-    # fmt: on
+-
  
  # Regression test for https://github.com/psf/black/issues/3436.
-@@ -83,5 +80,5 @@
-     return x
- # fmt: off
- elif   unformatted:
+-if x:
+-    return x
+-# fmt: off
+-elif   unformatted:
 -    # fmt: on
 -    will_be_formatted()
-+# fmt: on
-+    will_be_formatted  ()
++NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Ruff Output
 
 ```py
 # Regression test for https://github.com/psf/black/issues/3129.
-setup(
-    entry_points={
-        # fmt: off
-        "console_scripts": [
-            "foo-bar"
-            "=foo.bar.:main",
-        # fmt: on
-            ]  # Includes an formatted indentation.
-    },
-)
+NOT_YET_IMPLEMENTED_ExprCall
 
 
 # Regression test for https://github.com/psf/black/issues/2015.
-run(
-    # fmt: off
-    [
-        "ls",
-        "-la",
-    ]
-    # fmt: on
-    + path,
-    check=True,
-)
+NOT_YET_IMPLEMENTED_ExprCall
 
 
 # Regression test for https://github.com/psf/black/issues/3026.
-def test_func():
-    # yapf: disable
-    if  unformatted(  args  ):
-        return True
-    # yapf: enable
-    elif b:
-        return True
-
-    return False
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Regression test for https://github.com/psf/black/issues/2567.
-if True:
-    # fmt: off
-    for _ in range( 1 ):
-    # fmt: on
-        print ( "This won't be formatted" )
-    print ( "This won't be formatted either" )
-else:
-    print ( "This will be formatted" )
+NOT_YET_IMPLEMENTED_StmtIf
 
 
 # Regression test for https://github.com/psf/black/issues/3184.
-class A:
-    async def call(param):
-        if param:
-            # fmt: off
-            if param[0:4] in (
-                "ABCD", "EFGH"
-            )  :
-                # fmt: on
-                print ( "This won't be formatted" )
-
-            elif param[0:4] in ("ZZZZ",):
-                print ( "This won't be formatted either" )
-
-        print ( "This will be formatted" )
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 # Regression test for https://github.com/psf/black/issues/2985.
-class Named(t.Protocol):
-    # fmt: off
-    @property
-    def  this_wont_be_formatted ( self ) -> str: ...
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class Factory(t.Protocol):
-    def  this_will_be_formatted ( self, **kwargs ) -> Named: ...
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 # Regression test for https://github.com/psf/black/issues/3436.
-if x:
-    return x
-# fmt: off
-elif   unformatted:
-# fmt: on
-    will_be_formatted  ()
+NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtonoff_py.snap

@@ -199,58 +199,60 @@ d={'a':1,
 ```diff
 --- Black
 +++ Ruff
-@@ -4,17 +4,18 @@
+@@ -1,224 +1,73 @@
+ #!/usr/bin/env python3
+-import asyncio
+-import sys
++NOT_YET_IMPLEMENTED_StmtImport
++NOT_YET_IMPLEMENTED_StmtImport
  
- from third_party import X, Y, Z
+-from third_party import X, Y, Z
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
 -from library import some_connection, some_decorator
 -
-+from library import some_connection, \
-+                    some_decorator
++NOT_YET_IMPLEMENTED_StmtImportFrom
  # fmt: off
- from third_party import (X,
-                          Y, Z)
+-from third_party import (X,
+-                         Y, Z)
++NOT_YET_IMPLEMENTED_StmtImportFrom
  # fmt: on
 -f"trigger 3.6 mode"
-+f'trigger 3.6 mode'
++NOT_YET_IMPLEMENTED_ExprJoinedStr
 +
 +
  # Comment 1
  
  # Comment 2
--
  
+-
  # fmt: off
- def func_no_args():
-@@ -26,11 +27,15 @@
-     continue
-   exec('new-style exec', {}, {})
-   return None
-+
-+
- async def coroutine(arg, exec=False):
-  'Single-line docstring. Multiline is harder to reformat.'
-  async with some_connection() as conn:
-      await conn.do_what_i_mean('SELECT bobby, tables FROM xkcd', timeout=2)
-  await asyncio.sleep(1)
-+
-+
- @asyncio.coroutine
- @some_decorator(
- with_args=True,
-@@ -38,28 +43,19 @@
- )
- def function_signature_stress_test(number:int,no_annotation=None,text:str='default',* ,debug:bool=False,**kwargs) -> str:
-  return text[number:-1]
-+
-+
- # fmt: on
+-def func_no_args():
+-  a; b; c
+-  if True: raise RuntimeError
+-  if False: ...
+-  for i in range(10):
+-    print(i)
+-    continue
+-  exec('new-style exec', {}, {})
+-  return None
+-async def coroutine(arg, exec=False):
+- 'Single-line docstring. Multiline is harder to reformat.'
+- async with some_connection() as conn:
+-     await conn.do_what_i_mean('SELECT bobby, tables FROM xkcd', timeout=2)
+- await asyncio.sleep(1)
+-@asyncio.coroutine
+-@some_decorator(
+-with_args=True,
+-many_args=[1,2,3]
+-)
+-def function_signature_stress_test(number:int,no_annotation=None,text:str='default',* ,debug:bool=False,**kwargs) -> str:
+- return text[number:-1]
+-# fmt: on
 -def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r""):
 -    offset = attr.ib(default=attr.Factory(lambda: _r.uniform(1, 2)))
 -    assert task._cancel_stack[: len(old_stack)] == old_stack
-+def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r''):
-+ offset = attr.ib(default=attr.Factory( lambda: _r.uniform(1, 2)))
-+ assert task._cancel_stack[:len(old_stack)] == old_stack
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def spaces_types(
@@ -265,115 +267,162 @@ d={'a':1,
 -    i: str = r"",
 -):
 -    ...
-+def spaces_types(a: int = 1, b: tuple = (), c: list = [], d: dict = {}, e: bool = True, f: int = -1, g: int = 1 if False else 2, h: str = "", i: str = r''): ...
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
 -def spaces2(result=_core.Value(None)):
 -    ...
-+def spaces2(result= _core.Value(None)):
-+ ...
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- something = {
-@@ -74,23 +70,20 @@
-         'some big and',
-         'complex subscript',
-         # fmt: on
+-something = {
+-    # fmt: off
+-    key: 'value',
+-}
++# fmt: on
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def subscriptlist():
+-    atom[
+-        # fmt: off
+-        'some big and',
+-        'complex subscript',
+-        # fmt: on
 -        goes + here,
 -        andhere,
 -    ]
-+        goes + here, andhere,
-+       ]
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def import_as_names():
-     # fmt: off
-     from hello import a,        b
-     'unformatted'
+-def import_as_names():
+-    # fmt: off
+-    from hello import a,        b
+-    'unformatted'
 -    # fmt: on
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def testlist_star_expr():
-     # fmt: off
-     a , b = *hello
-     'unformatted'
+-def testlist_star_expr():
+-    # fmt: off
+-    a , b = *hello
+-    'unformatted'
 -    # fmt: on
++NOT_YET_IMPLEMENTED_StmtAssign
  
  
- def yield_expr():
-@@ -98,11 +91,10 @@
-     yield hello
-     'unformatted'
-     # fmt: on
+-def yield_expr():
+-    # fmt: off
+-    yield hello
+-    'unformatted'
+-    # fmt: on
 -    "formatted"
-+    'formatted'
-     # fmt: off
-     ( yield hello )
-     'unformatted'
+-    # fmt: off
+-    ( yield hello )
+-    'unformatted'
 -    # fmt: on
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example(session):
-@@ -113,7 +105,6 @@
-                 models.Customer.email == email_address)\
-         .order_by(models.Customer.id.asc())\
-         .all()
+-def example(session):
+-    # fmt: off
+-    result = session\
+-        .query(models.Customer.id)\
+-        .filter(models.Customer.account_id == account_id,
+-                models.Customer.email == email_address)\
+-        .order_by(models.Customer.id.asc())\
+-        .all()
 -    # fmt: on
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def off_and_on_without_data():
-@@ -123,8 +114,10 @@
-     """
-     # fmt: off
+-def off_and_on_without_data():
+-    """All comments here are technically on the same prefix.
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    The comments between will be formatted. This is a known limitation.
+-    """
+-    # fmt: off
  
 -    # hey, that won't work
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-+        #hey, that won't work
-+
-+
-     # fmt: on
-     pass
+-    # fmt: on
+-    pass
  
-@@ -137,21 +130,12 @@
-     and_=indeed . it  is  not  formatted
-     because . the . handling . inside . generate_ignored_nodes()
-     now . considers . multiple . fmt . directives . within . one . prefix
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def on_and_off_broken():
+-    """Another known limitation."""
+-    # fmt: on
+-    # fmt: off
+-    this=should.not_be.formatted()
+-    and_=indeed . it  is  not  formatted
+-    because . the . handling . inside . generate_ignored_nodes()
+-    now . considers . multiple . fmt . directives . within . one . prefix
 -    # fmt: on
 -    # fmt: off
 -    # ...but comments still get reformatted even though they should not be
 -    # fmt: on
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- def long_lines():
-     if True:
-         typedargslist.extend(
+-def long_lines():
+-    if True:
+-        typedargslist.extend(
 -            gen_annotated_params(
 -                ast_args.kwonlyargs,
 -                ast_args.kw_defaults,
 -                parameters,
 -                implicit_default=True,
 -            )
-+            gen_annotated_params(ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True)
-         )
-         # fmt: off
-         a = (
-@@ -186,20 +170,19 @@
+-        )
+-        # fmt: off
+-        a = (
+-            unnecessary_bracket()
+-        )
+-        # fmt: on
+-    _type_comment_re = re.compile(
+-        r"""
+-        ^
+-        [\t ]*
+-        \#[ ]type:[ ]*
+-        (?P<type>
+-            [^#\t\n]+?
+-        )
+-        (?<!ignore)     # note: this will force the non-greedy + in <type> to match
+-                        # a trailing space which is why we need the silliness below
+-        (?<!ignore[ ]{1})(?<!ignore[ ]{2})(?<!ignore[ ]{3})(?<!ignore[ ]{4})
+-        (?<!ignore[ ]{5})(?<!ignore[ ]{6})(?<!ignore[ ]{7})(?<!ignore[ ]{8})
+-        (?<!ignore[ ]{9})(?<!ignore[ ]{10})
+-        [\t ]*
+-        (?P<nl>
+-            (?:\#[^\n]*)?
+-            \n?
+-        )
+-        $
+-        """,
+-        # fmt: off
+-        re.MULTILINE|re.VERBOSE
+-        # fmt: on
+-    )
  
- def single_literal_yapf_disable():
-     """Black does not support this."""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def single_literal_yapf_disable():
+-    """Black does not support this."""
 -    BAZ = {(1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12)}  # yapf: disable
-+    BAZ = {
-+        (1, 2, 3, 4),
-+        (5, 6, 7, 8),
-+        (9, 10, 11, 12)
-+    }
  
++NOT_YET_IMPLEMENTED_StmtFunctionDef
++
++
++NOT_YET_IMPLEMENTED_StmtFunctionDef
++
  
- cfg.rule(
+-cfg.rule(
 -    "Default",
 -    "address",
-+    "Default", "address",
-     xxxx_xxxx=["xxx-xxxxxx-xxxxxxxxxx"],
+-    xxxx_xxxx=["xxx-xxxxxx-xxxxxxxxxx"],
 -    xxxxxx="xx_xxxxx",
 -    xxxxxxx="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
 -    xxxxxxxxx_xxxx=True,
@@ -381,39 +430,48 @@ d={'a':1,
 -    xxxxxx_xxxxxx=2,
 -    xxxxxx_xxxxx_xxxxxxxx=70,
 -    xxxxxx_xxxxxx_xxxxx=True,
-+    xxxxxx="xx_xxxxx", xxxxxxx="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
-+    xxxxxxxxx_xxxx=True, xxxxxxxx_xxxxxxxxxx=False,
-+    xxxxxx_xxxxxx=2, xxxxxx_xxxxx_xxxxxxxx=70, xxxxxx_xxxxxx_xxxxx=True,
-     # fmt: off
-     xxxxxxx_xxxxxxxxxxxx={
-         "xxxxxxxx": {
-@@ -214,7 +197,7 @@
-         },
-     },
-     # fmt: on
+-    # fmt: off
+-    xxxxxxx_xxxxxxxxxxxx={
+-        "xxxxxxxx": {
+-            "xxxxxx": False,
+-            "xxxxxxx": False,
+-            "xxxx_xxxxxx": "xxxxx",
+-        },
+-        "xxxxxxxx-xxxxx": {
+-            "xxxxxx": False,
+-            "xxxxxxx": True,
+-            "xxxx_xxxxxx": "xxxxxx",
+-        },
+-    },
+-    # fmt: on
 -    xxxxxxxxxx_xxxxxxxxxxx_xxxxxxx_xxxxxxxxx=5,
-+    xxxxxxxxxx_xxxxxxxxxxx_xxxxxxx_xxxxxxxxx=5
- )
+-)
++NOT_YET_IMPLEMENTED_ExprCall
  # fmt: off
- yield  'hello'
+-yield  'hello'
++NOT_YET_IMPLEMENTED_ExprYield
+ # No formatting to the end of the file
+-l=[1,2,3]
+-d={'a':1,
+-   'b':2}
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
 #!/usr/bin/env python3
-import asyncio
-import sys
+NOT_YET_IMPLEMENTED_StmtImport
+NOT_YET_IMPLEMENTED_StmtImport
 
-from third_party import X, Y, Z
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-from library import some_connection, \
-                    some_decorator
+NOT_YET_IMPLEMENTED_StmtImportFrom
 # fmt: off
-from third_party import (X,
-                         Y, Z)
+NOT_YET_IMPLEMENTED_StmtImportFrom
 # fmt: on
-f'trigger 3.6 mode'
+NOT_YET_IMPLEMENTED_ExprJoinedStr
 
 
 # Comment 1
@@ -421,193 +479,61 @@ f'trigger 3.6 mode'
 # Comment 2
 
 # fmt: off
-def func_no_args():
-  a; b; c
-  if True: raise RuntimeError
-  if False: ...
-  for i in range(10):
-    print(i)
-    continue
-  exec('new-style exec', {}, {})
-  return None
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-async def coroutine(arg, exec=False):
- 'Single-line docstring. Multiline is harder to reformat.'
- async with some_connection() as conn:
-     await conn.do_what_i_mean('SELECT bobby, tables FROM xkcd', timeout=2)
- await asyncio.sleep(1)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-@asyncio.coroutine
-@some_decorator(
-with_args=True,
-many_args=[1,2,3]
-)
-def function_signature_stress_test(number:int,no_annotation=None,text:str='default',* ,debug:bool=False,**kwargs) -> str:
- return text[number:-1]
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # fmt: on
-def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r''):
- offset = attr.ib(default=attr.Factory( lambda: _r.uniform(1, 2)))
- assert task._cancel_stack[:len(old_stack)] == old_stack
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def spaces_types(a: int = 1, b: tuple = (), c: list = [], d: dict = {}, e: bool = True, f: int = -1, g: int = 1 if False else 2, h: str = "", i: str = r''): ...
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def spaces2(result= _core.Value(None)):
- ...
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-something = {
+NOT_YET_IMPLEMENTED_StmtAssign
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_StmtFunctionDef
+
+
+NOT_YET_IMPLEMENTED_ExprCall
 # fmt: off
-    key: 'value',
-}
-
-
-def subscriptlist():
-    atom[
-        # fmt: off
-        'some big and',
-        'complex subscript',
-        # fmt: on
-        goes + here, andhere,
-       ]
-
-
-def import_as_names():
-    # fmt: off
-    from hello import a,        b
-    'unformatted'
-
-
-def testlist_star_expr():
-    # fmt: off
-    a , b = *hello
-    'unformatted'
-
-
-def yield_expr():
-    # fmt: off
-    yield hello
-    'unformatted'
-    # fmt: on
-    'formatted'
-    # fmt: off
-    ( yield hello )
-    'unformatted'
-
-
-def example(session):
-    # fmt: off
-    result = session\
-        .query(models.Customer.id)\
-        .filter(models.Customer.account_id == account_id,
-                models.Customer.email == email_address)\
-        .order_by(models.Customer.id.asc())\
-        .all()
-
-
-def off_and_on_without_data():
-    """All comments here are technically on the same prefix.
-
-    The comments between will be formatted. This is a known limitation.
-    """
-    # fmt: off
-
-
-        #hey, that won't work
-
-
-    # fmt: on
-    pass
-
-
-def on_and_off_broken():
-    """Another known limitation."""
-    # fmt: on
-    # fmt: off
-    this=should.not_be.formatted()
-    and_=indeed . it  is  not  formatted
-    because . the . handling . inside . generate_ignored_nodes()
-    now . considers . multiple . fmt . directives . within . one . prefix
-
-
-def long_lines():
-    if True:
-        typedargslist.extend(
-            gen_annotated_params(ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True)
-        )
-        # fmt: off
-        a = (
-            unnecessary_bracket()
-        )
-        # fmt: on
-    _type_comment_re = re.compile(
-        r"""
-        ^
-        [\t ]*
-        \#[ ]type:[ ]*
-        (?P<type>
-            [^#\t\n]+?
-        )
-        (?<!ignore)     # note: this will force the non-greedy + in <type> to match
-                        # a trailing space which is why we need the silliness below
-        (?<!ignore[ ]{1})(?<!ignore[ ]{2})(?<!ignore[ ]{3})(?<!ignore[ ]{4})
-        (?<!ignore[ ]{5})(?<!ignore[ ]{6})(?<!ignore[ ]{7})(?<!ignore[ ]{8})
-        (?<!ignore[ ]{9})(?<!ignore[ ]{10})
-        [\t ]*
-        (?P<nl>
-            (?:\#[^\n]*)?
-            \n?
-        )
-        $
-        """,
-        # fmt: off
-        re.MULTILINE|re.VERBOSE
-        # fmt: on
-    )
-
-
-def single_literal_yapf_disable():
-    """Black does not support this."""
-    BAZ = {
-        (1, 2, 3, 4),
-        (5, 6, 7, 8),
-        (9, 10, 11, 12)
-    }
-
-
-cfg.rule(
-    "Default", "address",
-    xxxx_xxxx=["xxx-xxxxxx-xxxxxxxxxx"],
-    xxxxxx="xx_xxxxx", xxxxxxx="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
-    xxxxxxxxx_xxxx=True, xxxxxxxx_xxxxxxxxxx=False,
-    xxxxxx_xxxxxx=2, xxxxxx_xxxxx_xxxxxxxx=70, xxxxxx_xxxxxx_xxxxx=True,
-    # fmt: off
-    xxxxxxx_xxxxxxxxxxxx={
-        "xxxxxxxx": {
-            "xxxxxx": False,
-            "xxxxxxx": False,
-            "xxxx_xxxxxx": "xxxxx",
-        },
-        "xxxxxxxx-xxxxx": {
-            "xxxxxx": False,
-            "xxxxxxx": True,
-            "xxxx_xxxxxx": "xxxxxx",
-        },
-    },
-    # fmt: on
-    xxxxxxxxxx_xxxxxxxxxxx_xxxxxxx_xxxxxxxxx=5
-)
-# fmt: off
-yield  'hello'
+NOT_YET_IMPLEMENTED_ExprYield
 # No formatting to the end of the file
-l=[1,2,3]
-d={'a':1,
-   'b':2}
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip2_py.snap

@@ -22,22 +22,23 @@ l3 = ["I have", "trailing comma", "so I should be braked",]
 -    "into multiple lines",
 -    "because it is way too long",
 -]
-+l1 = ["This list should be broken up", "into multiple lines", "because it is way too long"]
- l2 = ["But this list shouldn't", "even though it also has", "way too many characters in it"]  # fmt: skip
+-l2 = ["But this list shouldn't", "even though it also has", "way too many characters in it"]  # fmt: skip
 -l3 = [
 -    "I have",
 -    "trailing comma",
 -    "so I should be braked",
 -]
-+l3 = ["I have", "trailing comma", "so I should be braked",]
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
-l1 = ["This list should be broken up", "into multiple lines", "because it is way too long"]
-l2 = ["But this list shouldn't", "even though it also has", "way too many characters in it"]  # fmt: skip
-l3 = ["I have", "trailing comma", "so I should be braked",]
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip3_py.snap

@@ -22,29 +22,32 @@ f = ["This is a very long line that should be formatted into a clearer line ", "
 +++ Ruff
 @@ -1,10 +1,7 @@
 -a = 3
-+a  =    3
++NOT_YET_IMPLEMENTED_StmtAssign
  # fmt: off
- b,    c = 1, 2
- d =    6  # fmt: skip
- e = 5
+-b,    c = 1, 2
+-d =    6  # fmt: skip
+-e = 5
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtAssign
  # fmt: on
 -f = [
 -    "This is a very long line that should be formatted into a clearer line ",
 -    "by rearranging.",
 -]
-+f = ["This is a very long line that should be formatted into a clearer line ", "by rearranging."]
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
-a  =    3
+NOT_YET_IMPLEMENTED_StmtAssign
 # fmt: off
-b,    c = 1, 2
-d =    6  # fmt: skip
-e = 5
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtAssign
 # fmt: on
-f = ["This is a very long line that should be formatted into a clearer line ", "by rearranging."]
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip4_py.snap

@@ -18,22 +18,22 @@ l = [1, 2, 3,]
 +++ Ruff
 @@ -1,7 +1,3 @@
 -a = 2
-+a =   2
++NOT_YET_IMPLEMENTED_StmtAssign
  # fmt: skip
 -l = [
 -    1,
 -    2,
 -    3,
 -]
-+l = [1, 2, 3,]
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
-a =   2
+NOT_YET_IMPLEMENTED_StmtAssign
 # fmt: skip
-l = [1, 2, 3,]
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip5_py.snap

@@ -22,29 +22,25 @@ else:
 ```diff
 --- Black
 +++ Ruff
-@@ -1,6 +1,6 @@
+@@ -1,9 +1,2 @@
 -a, b, c = 3, 4, 5
-+a, b, c = 3, 4,       5
- if (
+-if (
 -    a == 3
-+    a ==    3
-     and b    != 9  # fmt: skip
-     and c is not None
- ):
+-    and b    != 9  # fmt: skip
+-    and c is not None
+-):
+-    print("I'm good!")
+-else:
+-    print("I'm bad")
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Ruff Output
 
 ```py
-a, b, c = 3, 4,       5
-if (
-    a ==    3
-    and b    != 9  # fmt: skip
-    and c is not None
-):
-    print("I'm good!")
-else:
-    print("I'm bad")
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtIf
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip6_py.snap

@@ -18,22 +18,19 @@ class A:
 ```diff
 --- Black
 +++ Ruff
-@@ -2,4 +2,4 @@
-     def f(self):
-         for line in range(10):
-             if True:
+@@ -1,5 +1 @@
+-class A:
+-    def f(self):
+-        for line in range(10):
+-            if True:
 -                pass  # fmt: skip
-+                pass
++NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Ruff Output
 
 ```py
-class A:
-    def f(self):
-        for line in range(10):
-            if True:
-                pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip7_py.snap

@@ -19,19 +19,22 @@ d = "thisisasuperlongstringthisisasuperlongstringthisisasuperlongstringthisisasu
 +++ Ruff
 @@ -1,4 +1,4 @@
 -a = "this is some code"
-+a =     "this is some code"
- b =     5  # fmt:skip
- c = 9  # fmt: skip
- d = "thisisasuperlongstringthisisasuperlongstringthisisasuperlongstringthisisasuperlongstring"  # fmt:skip
+-b =     5  # fmt:skip
+-c = 9  # fmt: skip
+-d = "thisisasuperlongstringthisisasuperlongstringthisisasuperlongstringthisisasuperlongstring"  # fmt:skip
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt:skip
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt:skip
 ```
 
 ## Ruff Output
 
 ```py
-a =     "this is some code"
-b =     5  # fmt:skip
-c = 9  # fmt: skip
-d = "thisisasuperlongstringthisisasuperlongstringthisisasuperlongstringthisisasuperlongstring"  # fmt:skip
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt:skip
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt:skip
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip8_py.snap

@@ -75,108 +75,118 @@ async def test_async_with():
 ```diff
 --- Black
 +++ Ruff
-@@ -2,7 +2,6 @@
- def some_func(  unformatted,  args  ):  # fmt: skip
-     print("I am some_func")
-     return 0
+@@ -1,62 +1,33 @@
+ # Make sure a leading comment is not removed.
+-def some_func(  unformatted,  args  ):  # fmt: skip
+-    print("I am some_func")
+-    return 0
 -    # Make sure this comment is not removed.
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Make sure a leading comment is not removed.
-@@ -29,15 +28,15 @@
- elif  another_unformatted_call(  args  ):  # fmt: skip
-     print("Second branch")
- else  :  # fmt: skip
+-async def some_async_func(  unformatted,   args):  # fmt: skip
+-    print("I am some_async_func")
+-    await asyncio.sleep(1)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+ # Make sure a leading comment is not removed.
+-class SomeClass(  Unformatted,  SuperClasses  ):  # fmt: skip
+-    def some_method(  self,  unformatted,  args  ):  # fmt: skip
+-        print("I am some_method")
+-        return 0
++NOT_YET_IMPLEMENTED_StmtClassDef
+ 
+-    async def some_async_method(  self,  unformatted,  args  ):  # fmt: skip
+-        print("I am some_async_method")
+-        await asyncio.sleep(1)
+ 
+-
+ # Make sure a leading comment is not removed.
+-if  unformatted_call(  args  ):  # fmt: skip
+-    print("First branch")
+-    # Make sure this is not removed.
+-elif  another_unformatted_call(  args  ):  # fmt: skip
+-    print("Second branch")
+-else  :  # fmt: skip
 -    print("Last branch")
-+    print("Last branch")  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtIf  # fmt: skip
  
  
 -while  some_condition(  unformatted,  args  ):  # fmt: skip
-+while some_condition(  unformatted,  args  ):  # fmt: skip
-     print("Do something")
- 
- 
- for  i  in  some_iter(  unformatted,  args  ):  # fmt: skip
 -    print("Do something")
-+    print("Do something")  # fmt: skip
++while NOT_YET_IMPLEMENTED_ExprCall:  # fmt: skip
++    NOT_YET_IMPLEMENTED_ExprCall
  
  
- async def test_async_for():
-@@ -54,7 +53,7 @@
- 
- 
- with  give_me_context(  unformatted,  args  ):  # fmt: skip
+-for  i  in  some_iter(  unformatted,  args  ):  # fmt: skip
 -    print("Do something")
-+    print("Do something")  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtFor  # fmt: skip
  
  
- async def test_async_with():
+-async def test_async_for():
+-    async  for  i  in  some_async_iter(  unformatted,  args  ):  # fmt: skip
+-        print("Do something")
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+-try  :  # fmt: skip
+-    some_call()
+-except  UnformattedError  as  ex:  # fmt: skip
+-    handle_exception()
+-finally  :  # fmt: skip
+-    finally_call()
++NOT_YET_IMPLEMENTED_StmtTry
+ 
+ 
+-with  give_me_context(  unformatted,  args  ):  # fmt: skip
+-    print("Do something")
++NOT_YET_IMPLEMENTED_StmtWith  # fmt: skip
+ 
+ 
+-async def test_async_with():
+-    async  with  give_me_async_context(  unformatted,  args  ):  # fmt: skip
+-        print("Do something")
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
 # Make sure a leading comment is not removed.
-def some_func(  unformatted,  args  ):  # fmt: skip
-    print("I am some_func")
-    return 0
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Make sure a leading comment is not removed.
-async def some_async_func(  unformatted,   args):  # fmt: skip
-    print("I am some_async_func")
-    await asyncio.sleep(1)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Make sure a leading comment is not removed.
-class SomeClass(  Unformatted,  SuperClasses  ):  # fmt: skip
-    def some_method(  self,  unformatted,  args  ):  # fmt: skip
-        print("I am some_method")
-        return 0
-
-    async def some_async_method(  self,  unformatted,  args  ):  # fmt: skip
-        print("I am some_async_method")
-        await asyncio.sleep(1)
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
 # Make sure a leading comment is not removed.
-if  unformatted_call(  args  ):  # fmt: skip
-    print("First branch")
-    # Make sure this is not removed.
-elif  another_unformatted_call(  args  ):  # fmt: skip
-    print("Second branch")
-else  :  # fmt: skip
-    print("Last branch")  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtIf  # fmt: skip
 
 
-while some_condition(  unformatted,  args  ):  # fmt: skip
-    print("Do something")
+while NOT_YET_IMPLEMENTED_ExprCall:  # fmt: skip
+    NOT_YET_IMPLEMENTED_ExprCall
 
 
-for  i  in  some_iter(  unformatted,  args  ):  # fmt: skip
-    print("Do something")  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtFor  # fmt: skip
 
 
-async def test_async_for():
-    async  for  i  in  some_async_iter(  unformatted,  args  ):  # fmt: skip
-        print("Do something")
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-try  :  # fmt: skip
-    some_call()
-except  UnformattedError  as  ex:  # fmt: skip
-    handle_exception()
-finally  :  # fmt: skip
-    finally_call()
+NOT_YET_IMPLEMENTED_StmtTry
 
 
-with  give_me_context(  unformatted,  args  ):  # fmt: skip
-    print("Do something")  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtWith  # fmt: skip
 
 
-async def test_async_with():
-    async  with  give_me_async_context(  unformatted,  args  ):  # fmt: skip
-        print("Do something")
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fmtskip_py.snap

@@ -0,0 +1,44 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/fmtskip.py
+---
+## Input
+
+```py
+a, b = 1, 2
+c =    6  # fmt: skip
+d = 5
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1,3 +1,3 @@
+-a, b = 1, 2
+-c =    6  # fmt: skip
+-d = 5
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
++NOT_YET_IMPLEMENTED_StmtAssign
+```
+
+## Ruff Output
+
+```py
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign  # fmt: skip
+NOT_YET_IMPLEMENTED_StmtAssign
+```
+
+## Black Output
+
+```py
+a, b = 1, 2
+c =    6  # fmt: skip
+d = 5
+```
+
+

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__fstring_py.snap

@@ -22,28 +22,39 @@ f'Hello \'{tricky + "example"}\''
 ```diff
 --- Black
 +++ Ruff
-@@ -1,6 +1,6 @@
- f"f-string without formatted values is just a string"
- f"{{NOT a formatted value}}"
+@@ -1,9 +1,9 @@
+-f"f-string without formatted values is just a string"
+-f"{{NOT a formatted value}}"
 -f'{{NOT \'a\' "formatted" "value"}}'
-+f"{{NOT 'a' \"formatted\" \"value\"}}"
- f"some f-string with {a} {few():.2f} {formatted.values!r}"
- f'some f-string with {a} {few(""):.2f} {formatted.values!r}'
- f"{f'''{'nested'} inner'''} outer"
+-f"some f-string with {a} {few():.2f} {formatted.values!r}"
+-f'some f-string with {a} {few(""):.2f} {formatted.values!r}'
+-f"{f'''{'nested'} inner'''} outer"
+-f"\"{f'{nested} inner'}\" outer"
+-f"space between opening braces: { {a for a in (1, 2, 3)}}"
+-f'Hello \'{tricky + "example"}\''
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
++NOT_YET_IMPLEMENTED_ExprJoinedStr
 ```
 
 ## Ruff Output
 
 ```py
-f"f-string without formatted values is just a string"
-f"{{NOT a formatted value}}"
-f"{{NOT 'a' \"formatted\" \"value\"}}"
-f"some f-string with {a} {few():.2f} {formatted.values!r}"
-f'some f-string with {a} {few(""):.2f} {formatted.values!r}'
-f"{f'''{'nested'} inner'''} outer"
-f"\"{f'{nested} inner'}\" outer"
-f"space between opening braces: { {a for a in (1, 2, 3)}}"
-f'Hello \'{tricky + "example"}\''
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
+NOT_YET_IMPLEMENTED_ExprJoinedStr
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__function2_py.snap

@@ -66,128 +66,94 @@ with hmm_but_this_should_get_two_preceding_newlines():
 ```diff
 --- Black
 +++ Ruff
-@@ -1,11 +1,11 @@
- def f(
+@@ -1,65 +1,12 @@
+-def f(
 -    a,
 -    **kwargs,
-+  a,
-+  **kwargs,
- ) -> A:
-     with cache_dir():
-         if something:
+-) -> A:
+-    with cache_dir():
+-        if something:
 -            result = CliRunner().invoke(
 -                black.main, [str(src1), str(src2), "--diff", "--check"]
-+            result = (
-+                CliRunner().invoke(black.main, [str(src1), str(src2), "--diff", "--check"])
-             )
-     limited.append(-limited.pop())  # negate top
-     return A(
-@@ -17,30 +17,24 @@
- 
- def g():
-     "Docstring."
+-            )
+-    limited.append(-limited.pop())  # negate top
+-    return A(
+-        very_long_argument_name1=very_long_value_for_the_argument,
+-        very_long_argument_name2=-very.long.value.for_the_argument,
+-        **kwargs,
+-    )
 -
-     def inner():
-         pass
 -
-     print("Inner defs should breathe a little.")
- 
- 
- def h():
-     def inner():
-         pass
+-def g():
+-    "Docstring."
 -
-     print("Inner defs should breathe a little.")
- 
- 
- if os.name == "posix":
-     import termios
+-    def inner():
+-        pass
 -
-     def i_should_be_followed_by_only_one_newline():
-         pass
+-    print("Inner defs should breathe a little.")
 -
- elif os.name == "nt":
-     try:
-         import msvcrt
 -
-         def i_should_be_followed_by_only_one_newline():
-             pass
+-def h():
+-    def inner():
+-        pass
+-
+-    print("Inner defs should breathe a little.")
+-
+-
+-if os.name == "posix":
+-    import termios
+-
+-    def i_should_be_followed_by_only_one_newline():
+-        pass
+-
+-elif os.name == "nt":
+-    try:
+-        import msvcrt
+-
+-        def i_should_be_followed_by_only_one_newline():
+-            pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-@@ -54,12 +48,10 @@
-     class IHopeYouAreHavingALovelyDay:
-         def __call__(self):
-             print("i_should_be_followed_by_only_one_newline")
--
- else:
+-    except ImportError:
  
-     def foo():
-         pass
+-        def i_should_be_followed_by_only_one_newline():
+-            pass
 -
+-elif False:
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
- with hmm_but_this_should_get_two_preceding_newlines():
-     pass
+-    class IHopeYouAreHavingALovelyDay:
+-        def __call__(self):
+-            print("i_should_be_followed_by_only_one_newline")
+ 
+-else:
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-    def foo():
+-        pass
+ 
++NOT_YET_IMPLEMENTED_StmtIf
+ 
+-with hmm_but_this_should_get_two_preceding_newlines():
+-    pass
++NOT_YET_IMPLEMENTED_StmtWith
 ```
 
 ## Ruff Output
 
 ```py
-def f(
-  a,
-  **kwargs,
-) -> A:
-    with cache_dir():
-        if something:
-            result = (
-                CliRunner().invoke(black.main, [str(src1), str(src2), "--diff", "--check"])
-            )
-    limited.append(-limited.pop())  # negate top
-    return A(
-        very_long_argument_name1=very_long_value_for_the_argument,
-        very_long_argument_name2=-very.long.value.for_the_argument,
-        **kwargs,
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def g():
-    "Docstring."
-    def inner():
-        pass
-    print("Inner defs should breathe a little.")
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def h():
-    def inner():
-        pass
-    print("Inner defs should breathe a little.")
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-if os.name == "posix":
-    import termios
-    def i_should_be_followed_by_only_one_newline():
-        pass
-elif os.name == "nt":
-    try:
-        import msvcrt
-        def i_should_be_followed_by_only_one_newline():
-            pass
+NOT_YET_IMPLEMENTED_StmtIf
 
-    except ImportError:
-
-        def i_should_be_followed_by_only_one_newline():
-            pass
-
-elif False:
-
-    class IHopeYouAreHavingALovelyDay:
-        def __call__(self):
-            print("i_should_be_followed_by_only_one_newline")
-else:
-
-    def foo():
-        pass
-
-with hmm_but_this_should_get_two_preceding_newlines():
-    pass
+NOT_YET_IMPLEMENTED_StmtWith
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__function_py.snap

@@ -108,19 +108,24 @@ def __await__(): return (yield)
 ```diff
 --- Black
 +++ Ruff
-@@ -4,97 +4,67 @@
+@@ -1,148 +1,41 @@
+ #!/usr/bin/env python3
+-import asyncio
+-import sys
++NOT_YET_IMPLEMENTED_StmtImport
++NOT_YET_IMPLEMENTED_StmtImport
  
- from third_party import X, Y, Z
+-from third_party import X, Y, Z
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
 -from library import some_connection, some_decorator
-+from library import some_connection, \
-+                    some_decorator
-+f'trigger 3.6 mode'
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_ExprJoinedStr
  
 -f"trigger 3.6 mode"
 -
  
- def func_no_args():
+-def func_no_args():
 -    a
 -    b
 -    c
@@ -133,28 +138,18 @@ def __await__(): return (yield)
 -        continue
 -    exec("new-style exec", {}, {})
 -    return None
-+  a; b; c
-+  if True: raise RuntimeError
-+  if False: ...
-+  for i in range(10):
-+    print(i)
-+    continue
-+  exec("new-style exec", {}, {})
-+  return None
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- async def coroutine(arg, exec=False):
+-async def coroutine(arg, exec=False):
 -    "Single-line docstring. Multiline is harder to reformat."
 -    async with some_connection() as conn:
 -        await conn.do_what_i_mean("SELECT bobby, tables FROM xkcd", timeout=2)
 -    await asyncio.sleep(1)
-+ "Single-line docstring. Multiline is harder to reformat."
-+ async with some_connection() as conn:
-+     await conn.do_what_i_mean('SELECT bobby, tables FROM xkcd', timeout=2)
-+ await asyncio.sleep(1)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- @asyncio.coroutine
+-@asyncio.coroutine
 -@some_decorator(with_args=True, many_args=[1, 2, 3])
 -def function_signature_stress_test(
 -    number: int,
@@ -165,20 +160,13 @@ def __await__(): return (yield)
 -    **kwargs,
 -) -> str:
 -    return text[number:-1]
-+@some_decorator(
-+with_args=True,
-+many_args=[1,2,3]
-+)
-+def function_signature_stress_test(number:int,no_annotation=None,text:str="default",* ,debug:bool=False,**kwargs) -> str:
-+ return text[number:-1]
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r""):
 -    offset = attr.ib(default=attr.Factory(lambda: _r.uniform(10000, 200000)))
 -    assert task._cancel_stack[: len(old_stack)] == old_stack
-+def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r''):
-+ offset = attr.ib(default=attr.Factory( lambda: _r.uniform(10000, 200000)))
-+ assert task._cancel_stack[:len(old_stack)] == old_stack
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def spaces_types(
@@ -193,16 +181,15 @@ def __await__(): return (yield)
 -    i: str = r"",
 -):
 -    ...
-+def spaces_types(a: int = 1, b: tuple = (), c: list = [], d: dict = {}, e: bool = True, f: int = -1, g: int = 1 if False else 2, h: str = "", i: str = r''): ...
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def spaces2(result=_core.Value(None)):
 -    assert fut is self._read_fut, (fut, self._read_fut)
-+def spaces2(result= _core.Value(None)):
-+ assert fut is self._read_fut, (fut, self._read_fut)
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example(session):
+-def example(session):
 -    result = (
 -        session.query(models.Customer.id)
 -        .filter(
@@ -212,195 +199,126 @@ def __await__(): return (yield)
 -        .order_by(models.Customer.id.asc())
 -        .all()
 -    )
-+    result = session.query(models.Customer.id).filter(
-+        models.Customer.account_id == account_id,
-+        models.Customer.email == email_address,
-+    ).order_by(
-+        models.Customer.id.asc()
-+    ).all()
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def long_lines():
-     if True:
-         typedargslist.extend(
+-def long_lines():
+-    if True:
+-        typedargslist.extend(
 -            gen_annotated_params(
 -                ast_args.kwonlyargs,
 -                ast_args.kw_defaults,
 -                parameters,
 -                implicit_default=True,
 -            )
-+            gen_annotated_params(ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True)
-         )
-         typedargslist.extend(
-             gen_annotated_params(
+-        )
+-        typedargslist.extend(
+-            gen_annotated_params(
 -                ast_args.kwonlyargs,
 -                ast_args.kw_defaults,
 -                parameters,
 -                implicit_default=True,
-+                ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True,
-                 # trailing standalone comment
-             )
-         )
-@@ -117,23 +87,22 @@
-             \n?
-         )
-         $
+-                # trailing standalone comment
+-            )
+-        )
+-    _type_comment_re = re.compile(
+-        r"""
+-        ^
+-        [\t ]*
+-        \#[ ]type:[ ]*
+-        (?P<type>
+-            [^#\t\n]+?
+-        )
+-        (?<!ignore)     # note: this will force the non-greedy + in <type> to match
+-                        # a trailing space which is why we need the silliness below
+-        (?<!ignore[ ]{1})(?<!ignore[ ]{2})(?<!ignore[ ]{3})(?<!ignore[ ]{4})
+-        (?<!ignore[ ]{5})(?<!ignore[ ]{6})(?<!ignore[ ]{7})(?<!ignore[ ]{8})
+-        (?<!ignore[ ]{9})(?<!ignore[ ]{10})
+-        [\t ]*
+-        (?P<nl>
+-            (?:\#[^\n]*)?
+-            \n?
+-        )
+-        $
 -        """,
 -        re.MULTILINE | re.VERBOSE,
-+        """, re.MULTILINE | re.VERBOSE
-     )
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def trailing_comma():
-     mapping = {
+-def trailing_comma():
+-    mapping = {
 -        A: 0.25 * (10.0 / 12),
 -        B: 0.1 * (10.0 / 12),
 -        C: 0.1 * (10.0 / 12),
 -        D: 0.1 * (10.0 / 12),
 -    }
-+    A: 0.25 * (10.0 / 12),
-+    B: 0.1 * (10.0 / 12),
-+    C: 0.1 * (10.0 / 12),
-+    D: 0.1 * (10.0 / 12),
-+}
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def f(
+-def f(
 -    a,
 -    **kwargs,
-+  a,
-+  **kwargs,
- ) -> A:
-     return (
-         yield from A(
-@@ -144,5 +113,4 @@
-     )
+-) -> A:
+-    return (
+-        yield from A(
+-            very_long_argument_name1=very_long_value_for_the_argument,
+-            very_long_argument_name2=very_long_value_for_the_argument,
+-            **kwargs,
+-        )
+-    )
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def __await__():
 -    return (yield)
-+def __await__(): return (yield)
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
 #!/usr/bin/env python3
-import asyncio
-import sys
+NOT_YET_IMPLEMENTED_StmtImport
+NOT_YET_IMPLEMENTED_StmtImport
 
-from third_party import X, Y, Z
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-from library import some_connection, \
-                    some_decorator
-f'trigger 3.6 mode'
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_ExprJoinedStr
 
 
-def func_no_args():
-  a; b; c
-  if True: raise RuntimeError
-  if False: ...
-  for i in range(10):
-    print(i)
-    continue
-  exec("new-style exec", {}, {})
-  return None
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-async def coroutine(arg, exec=False):
- "Single-line docstring. Multiline is harder to reformat."
- async with some_connection() as conn:
-     await conn.do_what_i_mean('SELECT bobby, tables FROM xkcd', timeout=2)
- await asyncio.sleep(1)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-@asyncio.coroutine
-@some_decorator(
-with_args=True,
-many_args=[1,2,3]
-)
-def function_signature_stress_test(number:int,no_annotation=None,text:str="default",* ,debug:bool=False,**kwargs) -> str:
- return text[number:-1]
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def spaces(a=1, b=(), c=[], d={}, e=True, f=-1, g=1 if False else 2, h="", i=r''):
- offset = attr.ib(default=attr.Factory( lambda: _r.uniform(10000, 200000)))
- assert task._cancel_stack[:len(old_stack)] == old_stack
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def spaces_types(a: int = 1, b: tuple = (), c: list = [], d: dict = {}, e: bool = True, f: int = -1, g: int = 1 if False else 2, h: str = "", i: str = r''): ...
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def spaces2(result= _core.Value(None)):
- assert fut is self._read_fut, (fut, self._read_fut)
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example(session):
-    result = session.query(models.Customer.id).filter(
-        models.Customer.account_id == account_id,
-        models.Customer.email == email_address,
-    ).order_by(
-        models.Customer.id.asc()
-    ).all()
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def long_lines():
-    if True:
-        typedargslist.extend(
-            gen_annotated_params(ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True)
-        )
-        typedargslist.extend(
-            gen_annotated_params(
-                ast_args.kwonlyargs, ast_args.kw_defaults, parameters, implicit_default=True,
-                # trailing standalone comment
-            )
-        )
-    _type_comment_re = re.compile(
-        r"""
-        ^
-        [\t ]*
-        \#[ ]type:[ ]*
-        (?P<type>
-            [^#\t\n]+?
-        )
-        (?<!ignore)     # note: this will force the non-greedy + in <type> to match
-                        # a trailing space which is why we need the silliness below
-        (?<!ignore[ ]{1})(?<!ignore[ ]{2})(?<!ignore[ ]{3})(?<!ignore[ ]{4})
-        (?<!ignore[ ]{5})(?<!ignore[ ]{6})(?<!ignore[ ]{7})(?<!ignore[ ]{8})
-        (?<!ignore[ ]{9})(?<!ignore[ ]{10})
-        [\t ]*
-        (?P<nl>
-            (?:\#[^\n]*)?
-            \n?
-        )
-        $
-        """, re.MULTILINE | re.VERBOSE
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def trailing_comma():
-    mapping = {
-    A: 0.25 * (10.0 / 12),
-    B: 0.1 * (10.0 / 12),
-    C: 0.1 * (10.0 / 12),
-    D: 0.1 * (10.0 / 12),
-}
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(
-  a,
-  **kwargs,
-) -> A:
-    return (
-        yield from A(
-            very_long_argument_name1=very_long_value_for_the_argument,
-            very_long_argument_name2=very_long_value_for_the_argument,
-            **kwargs,
-        )
-    )
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def __await__(): return (yield)
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__function_trailing_comma_py.snap

@@ -74,16 +74,15 @@ some_module.some_function(
 ```diff
 --- Black
 +++ Ruff
-@@ -1,69 +1,28 @@
+@@ -1,114 +1,31 @@
 -def f(
 -    a,
 -):
 -    d = {
 -        "key": "value",
 -    }
-+def f(a,):
-+    d = {'key': 'value',}
-     tup = (1,)
+-    tup = (1,)
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def f2(
@@ -98,9 +97,7 @@ some_module.some_function(
 -        1,
 -        2,
 -    )
-+def f2(a,b,):
-+    d = {'key': 'value', 'key2': 'value2',}
-+    tup = (1,2,)
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def f(
@@ -114,13 +111,10 @@ some_module.some_function(
 -    call2(
 -        arg=[1, 2, 3],
 -    )
-+def f(a:int=1,):
-+    call(arg={'explode': 'this',})
-+    call2(arg=[1,2,3],)
-     x = {
-         "a": 1,
-         "b": 2,
-     }["a"]
+-    x = {
+-        "a": 1,
+-        "b": 2,
+-    }["a"]
 -    if (
 -        a
 -        == {
@@ -134,8 +128,8 @@ some_module.some_function(
 -            "h": 8,
 -        }["a"]
 -    ):
-+    if a == {"a": 1,"b": 2,"c": 3,"d": 4,"e": 5,"f": 6,"g": 7,"h": 8,}["a"]:
-         pass
+-        pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> (
@@ -150,48 +144,51 @@ some_module.some_function(
 -            }
 -        }
 -    }
-+def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> Set[
-+    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-+]:
-+    json = {"k": {"k2": {"k3": [1,]}}}
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # The type annotation shouldn't get a trailing comma since that would change its type.
-@@ -74,24 +33,21 @@
-     pass
+ # Relevant bug report: https://github.com/psf/black/issues/2381.
+-def some_function_with_a_really_long_name() -> (
+-    returning_a_deeply_nested_import_of_a_type_i_suppose
+-):
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def some_method_with_a_really_long_name(
 -    very_long_parameter_so_yeah: str, another_long_parameter: int
 -) -> another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not:
-+def some_method_with_a_really_long_name(very_long_parameter_so_yeah: str, another_long_parameter: int) -> (
-+    another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not
-+):
-     pass
- 
- 
- def func() -> (
--    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
--        this_shouldn_t_get_a_trailing_comma_too
--    )
-+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(this_shouldn_t_get_a_trailing_comma_too)
- ):
-     pass
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def func() -> (
 -    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
-+def func() -> ((also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
-         this_shouldn_t_get_a_trailing_comma_too
+-        this_shouldn_t_get_a_trailing_comma_too
 -    )
-+    ))
- ):
-     pass
+-):
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-@@ -103,12 +59,5 @@
+ 
+-def func() -> (
+-    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+-        this_shouldn_t_get_a_trailing_comma_too
+-    )
+-):
+-    pass
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+ # Make sure inner one-element tuple won't explode
+-some_module.some_function(
+-    argument1, (one_element_tuple,), argument4, argument5, argument6
+-)
++NOT_YET_IMPLEMENTED_ExprCall
  
  # Inner trailing comma causes outer to explode
- some_module.some_function(
+-some_module.some_function(
 -    argument1,
 -    (
 -        one,
@@ -200,76 +197,44 @@ some_module.some_function(
 -    argument4,
 -    argument5,
 -    argument6,
-+    argument1, (one, two,), argument4, argument5, argument6
- )
+-)
++NOT_YET_IMPLEMENTED_ExprCall
 ```
 
 ## Ruff Output
 
 ```py
-def f(a,):
-    d = {'key': 'value',}
-    tup = (1,)
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f2(a,b,):
-    d = {'key': 'value', 'key2': 'value2',}
-    tup = (1,2,)
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def f(a:int=1,):
-    call(arg={'explode': 'this',})
-    call2(arg=[1,2,3],)
-    x = {
-        "a": 1,
-        "b": 2,
-    }["a"]
-    if a == {"a": 1,"b": 2,"c": 3,"d": 4,"e": 5,"f": 6,"g": 7,"h": 8,}["a"]:
-        pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> Set[
-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-]:
-    json = {"k": {"k2": {"k3": [1,]}}}
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # The type annotation shouldn't get a trailing comma since that would change its type.
 # Relevant bug report: https://github.com/psf/black/issues/2381.
-def some_function_with_a_really_long_name() -> (
-    returning_a_deeply_nested_import_of_a_type_i_suppose
-):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def some_method_with_a_really_long_name(very_long_parameter_so_yeah: str, another_long_parameter: int) -> (
-    another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not
-):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def func() -> (
-    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(this_shouldn_t_get_a_trailing_comma_too)
-):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def func() -> ((also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
-        this_shouldn_t_get_a_trailing_comma_too
-    ))
-):
-    pass
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Make sure inner one-element tuple won't explode
-some_module.some_function(
-    argument1, (one_element_tuple,), argument4, argument5, argument6
-)
+NOT_YET_IMPLEMENTED_ExprCall
 
 # Inner trailing comma causes outer to explode
-some_module.some_function(
-    argument1, (one, two,), argument4, argument5, argument6
-)
+NOT_YET_IMPLEMENTED_ExprCall
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__import_spacing_py.snap

@@ -62,22 +62,44 @@ __all__ = (
 ```diff
 --- Black
 +++ Ruff
-@@ -2,8 +2,10 @@
+@@ -1,64 +1,31 @@
+-"""The asyncio package, tracking PEP 3156."""
++NOT_YET_IMPLEMENTED_ExprConstant
  
  # flake8: noqa
  
 -from logging import WARNING
- from logging import (
-+    WARNING
-+)
-+from logging import (
-     ERROR,
- )
- import sys
-@@ -22,33 +24,16 @@
- from ..streams import *
+-from logging import (
+-    ERROR,
+-)
+-import sys
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImport
  
- from some_library import (
+ # This relies on each of the submodules having an __all__ variable.
+-from .base_events import *
+-from .coroutines import *
+-from .events import *  # comment here
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
+ 
+-from .futures import *
+-from .locks import *  # comment here
+-from .protocols import *
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+-from ..runners import *  # comment here
+-from ..queues import *
+-from ..streams import *
++NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
+ 
+-from some_library import (
 -    Just,
 -    Enough,
 -    Libraries,
@@ -92,82 +114,76 @@ __all__ = (
 -    No,
 -    Longer,
 -    Use,
-+    Just, Enough, Libraries, To, Fit, In, This, Nice, Split, Which, We, No, Longer, Use
- )
+-)
 -from name_of_a_company.extremely_long_project_name.component.ttypes import (
 -    CuteLittleServiceHandlerFactoryyy,
 -)
-+from name_of_a_company.extremely_long_project_name.component.ttypes import CuteLittleServiceHandlerFactoryyy
- from name_of_a_company.extremely_long_project_name.extremely_long_component_name.ttypes import *
+-from name_of_a_company.extremely_long_project_name.extremely_long_component_name.ttypes import *
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
- from .a.b.c.subprocess import *
+-from .a.b.c.subprocess import *
 -from . import tasks
 -from . import A, B, C
 -from . import (
 -    SomeVeryLongNameAndAllOfItsAdditionalLetters1,
 -    SomeVeryLongNameAndAllOfItsAdditionalLetters2,
 -)
-+from . import (tasks)
-+from . import (A, B, C)
-+from . import SomeVeryLongNameAndAllOfItsAdditionalLetters1, \
-+              SomeVeryLongNameAndAllOfItsAdditionalLetters2
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
++NOT_YET_IMPLEMENTED_StmtImportFrom
  
- __all__ = (
-     base_events.__all__
+-__all__ = (
+-    base_events.__all__
+-    + coroutines.__all__
+-    + events.__all__
+-    + futures.__all__
+-    + locks.__all__
+-    + protocols.__all__
+-    + runners.__all__
+-    + queues.__all__
+-    + streams.__all__
+-    + tasks.__all__
+-)
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
 
 ```py
-"""The asyncio package, tracking PEP 3156."""
+NOT_YET_IMPLEMENTED_ExprConstant
 
 # flake8: noqa
 
-from logging import (
-    WARNING
-)
-from logging import (
-    ERROR,
-)
-import sys
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImport
 
 # This relies on each of the submodules having an __all__ variable.
-from .base_events import *
-from .coroutines import *
-from .events import *  # comment here
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
 
-from .futures import *
-from .locks import *  # comment here
-from .protocols import *
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-from ..runners import *  # comment here
-from ..queues import *
-from ..streams import *
+NOT_YET_IMPLEMENTED_StmtImportFrom  # comment here
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-from some_library import (
-    Just, Enough, Libraries, To, Fit, In, This, Nice, Split, Which, We, No, Longer, Use
-)
-from name_of_a_company.extremely_long_project_name.component.ttypes import CuteLittleServiceHandlerFactoryyy
-from name_of_a_company.extremely_long_project_name.extremely_long_component_name.ttypes import *
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-from .a.b.c.subprocess import *
-from . import (tasks)
-from . import (A, B, C)
-from . import SomeVeryLongNameAndAllOfItsAdditionalLetters1, \
-              SomeVeryLongNameAndAllOfItsAdditionalLetters2
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
+NOT_YET_IMPLEMENTED_StmtImportFrom
 
-__all__ = (
-    base_events.__all__
-    + coroutines.__all__
-    + events.__all__
-    + futures.__all__
-    + locks.__all__
-    + protocols.__all__
-    + runners.__all__
-    + queues.__all__
-    + streams.__all__
-    + tasks.__all__
-)
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__one_element_subscript_py.snap

@@ -25,8 +25,13 @@ list_of_types = [tuple[int,],]
 ```diff
 --- Black
 +++ Ruff
-@@ -4,19 +4,9 @@
- b = tuple[int,]
+@@ -1,22 +1,12 @@
+ # We should not treat the trailing comma
+ # in a single-element subscript.
+-a: tuple[int,]
+-b = tuple[int,]
++NOT_YET_IMPLEMENTED_StmtAnnAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # The magic comma still applies to multi-element subscripts.
 -c: tuple[
@@ -37,8 +42,8 @@ list_of_types = [tuple[int,],]
 -    int,
 -    int,
 -]
-+c: tuple[int, int,]
-+d = tuple[int, int,]
++NOT_YET_IMPLEMENTED_StmtAnnAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # Magic commas still work as expected for non-subscripts.
 -small_list = [
@@ -47,8 +52,8 @@ list_of_types = [tuple[int,],]
 -list_of_types = [
 -    tuple[int,],
 -]
-+small_list = [1,]
-+list_of_types = [tuple[int,],]
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
@@ -56,16 +61,16 @@ list_of_types = [tuple[int,],]
 ```py
 # We should not treat the trailing comma
 # in a single-element subscript.
-a: tuple[int,]
-b = tuple[int,]
+NOT_YET_IMPLEMENTED_StmtAnnAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # The magic comma still applies to multi-element subscripts.
-c: tuple[int, int,]
-d = tuple[int, int,]
+NOT_YET_IMPLEMENTED_StmtAnnAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # Magic commas still work as expected for non-subscripts.
-small_list = [1,]
-list_of_types = [tuple[int,],]
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__power_op_spacing_py.snap

@@ -76,87 +76,166 @@ return np.divide(
 ```diff
 --- Black
 +++ Ruff
-@@ -1,10 +1,10 @@
- def function(**kwargs):
-     t = a**2 + b**3
+@@ -1,63 +1,51 @@
+-def function(**kwargs):
+-    t = a**2 + b**3
 -    return t**2
-+    return t ** 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def function_replace_spaces(**kwargs):
+-def function_replace_spaces(**kwargs):
 -    t = a**2 + b**3 + c**4
-+    t = a **2 + b** 3 + c ** 4
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def function_dont_replace_spaces():
+-def function_dont_replace_spaces():
+-    {**a, **b, **c}
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-a = 5**~4
+-b = 5 ** f()
+-c = -(5**2)
+-d = 5 ** f["hi"]
+-e = lazy(lambda **kwargs: 5)
+-f = f() ** 5
+-g = a.b**c.d
+-h = 5 ** funcs.f()
+-i = funcs.f() ** 5
+-j = super().name ** 5
+-k = [(2**idx, value) for idx, value in pairs]
+-l = mod.weights_[0] == pytest.approx(0.95**100, abs=0.001)
+-m = [([2**63], [1, 2**63])]
+-n = count <= 10**5
+-o = settings(max_examples=10**6)
+-p = {(k, k**2): v**2 for k, v in pairs}
+-q = [10**i for i in range(6)]
+-r = x**y
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+-a = 5.0**~4.0
+-b = 5.0 ** f()
+-c = -(5.0**2.0)
+-d = 5.0 ** f["hi"]
+-e = lazy(lambda **kwargs: 5)
+-f = f() ** 5.0
+-g = a.b**c.d
+-h = 5.0 ** funcs.f()
+-i = funcs.f() ** 5.0
+-j = super().name ** 5.0
+-k = [(2.0**idx, value) for idx, value in pairs]
+-l = mod.weights_[0] == pytest.approx(0.95**100, abs=0.001)
+-m = [([2.0**63.0], [1.0, 2**63.0])]
+-n = count <= 10**5.0
+-o = settings(max_examples=10**6.0)
+-p = {(k, k**2): v**2.0 for k, v in pairs}
+-q = [10.5**i for i in range(6)]
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+ # WE SHOULD DEFINITELY NOT EAT THESE COMMENTS (https://github.com/psf/black/issues/2873)
+-if hasattr(view, "sum_of_weights"):
+-    return np.divide(  # type: ignore[no-any-return]
+-        view.variance,  # type: ignore[union-attr]
+-        view.sum_of_weights,  # type: ignore[union-attr]
+-        out=np.full(view.sum_of_weights.shape, np.nan),  # type: ignore[union-attr]
+-        where=view.sum_of_weights**2 > view.sum_of_weights_squared,  # type: ignore[union-attr]
+-    )
++NOT_YET_IMPLEMENTED_StmtIf
+ 
+-return np.divide(
+-    where=view.sum_of_weights_of_weight_long**2 > view.sum_of_weights_squared,  # type: ignore
+-)
++NOT_YET_IMPLEMENTED_StmtReturn
 ```
 
 ## Ruff Output
 
 ```py
-def function(**kwargs):
-    t = a**2 + b**3
-    return t ** 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def function_replace_spaces(**kwargs):
-    t = a **2 + b** 3 + c ** 4
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def function_dont_replace_spaces():
-    {**a, **b, **c}
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-a = 5**~4
-b = 5 ** f()
-c = -(5**2)
-d = 5 ** f["hi"]
-e = lazy(lambda **kwargs: 5)
-f = f() ** 5
-g = a.b**c.d
-h = 5 ** funcs.f()
-i = funcs.f() ** 5
-j = super().name ** 5
-k = [(2**idx, value) for idx, value in pairs]
-l = mod.weights_[0] == pytest.approx(0.95**100, abs=0.001)
-m = [([2**63], [1, 2**63])]
-n = count <= 10**5
-o = settings(max_examples=10**6)
-p = {(k, k**2): v**2 for k, v in pairs}
-q = [10**i for i in range(6)]
-r = x**y
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
-a = 5.0**~4.0
-b = 5.0 ** f()
-c = -(5.0**2.0)
-d = 5.0 ** f["hi"]
-e = lazy(lambda **kwargs: 5)
-f = f() ** 5.0
-g = a.b**c.d
-h = 5.0 ** funcs.f()
-i = funcs.f() ** 5.0
-j = super().name ** 5.0
-k = [(2.0**idx, value) for idx, value in pairs]
-l = mod.weights_[0] == pytest.approx(0.95**100, abs=0.001)
-m = [([2.0**63.0], [1.0, 2**63.0])]
-n = count <= 10**5.0
-o = settings(max_examples=10**6.0)
-p = {(k, k**2): v**2.0 for k, v in pairs}
-q = [10.5**i for i in range(6)]
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
 # WE SHOULD DEFINITELY NOT EAT THESE COMMENTS (https://github.com/psf/black/issues/2873)
-if hasattr(view, "sum_of_weights"):
-    return np.divide(  # type: ignore[no-any-return]
-        view.variance,  # type: ignore[union-attr]
-        view.sum_of_weights,  # type: ignore[union-attr]
-        out=np.full(view.sum_of_weights.shape, np.nan),  # type: ignore[union-attr]
-        where=view.sum_of_weights**2 > view.sum_of_weights_squared,  # type: ignore[union-attr]
-    )
+NOT_YET_IMPLEMENTED_StmtIf
 
-return np.divide(
-    where=view.sum_of_weights_of_weight_long**2 > view.sum_of_weights_squared,  # type: ignore
-)
+NOT_YET_IMPLEMENTED_StmtReturn
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__prefer_rhs_split_reformatted_py.snap

@@ -25,7 +25,7 @@ xxxxxxxxx_yyy_zzzzzzzz[xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxx
 ```diff
 --- Black
 +++ Ruff
-@@ -2,20 +2,11 @@
+@@ -2,20 +2,8 @@
  
  # Left hand side fits in a single line but will still be exploded by the
  # magic trailing comma.
@@ -37,17 +37,17 @@ xxxxxxxxx_yyy_zzzzzzzz[xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxx
 -    ),
 -    third_value,
 -) = xxxxxx_yyyyyy_zzzzzz_wwwwww_uuuuuuu_vvvvvvvvvvv(
-+first_value, (m1, m2,), third_value = xxxxxx_yyyyyy_zzzzzz_wwwwww_uuuuuuu_vvvvvvvvvvv(
-     arg1,
-     arg2,
- )
+-    arg1,
+-    arg2,
+-)
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # Make when when the left side of assignment plus the opening paren "... = (" is
  # exactly line length limit + 1, it won't be split like that.
 -xxxxxxxxx_yyy_zzzzzzzz[
 -    xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxxx=1)
 -] = 1
-+xxxxxxxxx_yyy_zzzzzzzz[xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxxx=1)] = 1
++NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Ruff Output
@@ -57,14 +57,11 @@ xxxxxxxxx_yyy_zzzzzzzz[xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxx
 
 # Left hand side fits in a single line but will still be exploded by the
 # magic trailing comma.
-first_value, (m1, m2,), third_value = xxxxxx_yyyyyy_zzzzzz_wwwwww_uuuuuuu_vvvvvvvvvvv(
-    arg1,
-    arg2,
-)
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # Make when when the left side of assignment plus the opening paren "... = (" is
 # exactly line length limit + 1, it won't be split like that.
-xxxxxxxxx_yyy_zzzzzzzz[xx.xxxxxx(x_yyy_zzzzzz.xxxxx[0]), x_yyy_zzzzzz.xxxxxx(xxxx=1)] = 1
+NOT_YET_IMPLEMENTED_StmtAssign
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__remove_await_parens_py.snap

@@ -94,51 +94,51 @@ async def main():
 ```diff
 --- Black
 +++ Ruff
-@@ -8,59 +8,64 @@
+@@ -1,93 +1,60 @@
+-import asyncio
++NOT_YET_IMPLEMENTED_StmtImport
+ 
+ 
+ # Control example
+-async def main():
+-    await asyncio.sleep(1)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
  
  # Remove brackets for short coroutine/task
- async def main():
+-async def main():
 -    await asyncio.sleep(1)
-+    await (asyncio.sleep(1))
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
 -    await asyncio.sleep(1)
-+    await (
-+        asyncio.sleep(1)
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
 -    await asyncio.sleep(1)
-+    await (asyncio.sleep(1)
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
  # Check comments
- async def main():
+-async def main():
 -    await asyncio.sleep(1)  # Hello
-+    await (  # Hello
-+        asyncio.sleep(1)
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
 -    await asyncio.sleep(1)  # Hello
-+    await (
-+        asyncio.sleep(1)  # Hello
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
 -    await asyncio.sleep(1)  # Hello
-+    await (
-+        asyncio.sleep(1)
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
  # Long lines
- async def main():
+-async def main():
 -    await asyncio.gather(
 -        asyncio.sleep(1),
 -        asyncio.sleep(1),
@@ -148,11 +148,11 @@ async def main():
 -        asyncio.sleep(1),
 -        asyncio.sleep(1),
 -    )
-+    await asyncio.gather(asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1))
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
  # Same as above but with magic trailing comma in function
- async def main():
+-async def main():
 -    await asyncio.gather(
 -        asyncio.sleep(1),
 -        asyncio.sleep(1),
@@ -162,145 +162,115 @@ async def main():
 -        asyncio.sleep(1),
 -        asyncio.sleep(1),
 -    )
-+    await asyncio.gather(asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1),)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
  # Cr@zY Br@ck3Tz
- async def main():
+-async def main():
 -    await black(1)
-+    await (
-+        (((((((((((((
-+        (((        (((
-+        (((         (((
-+        (((         (((
-+        (((        (((
-+        ((black(1)))
-+        )))        )))
-+        )))         )))
-+        )))         )))
-+        )))        )))
-+        )))))))))))))
-+    )
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
  # Keep brackets around non power operations and nested awaits
-@@ -82,11 +87,11 @@
+-async def main():
+-    await (set_of_tasks | other_set)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
 -    await (await asyncio.sleep(1))
-+    await (await (asyncio.sleep(1)))
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+ # It's awaits all the way down...
+-async def main():
+-    await (await x)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+-async def main():
+-    await (yield x)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+-async def main():
+-    await (await asyncio.sleep(1))
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+-async def main():
 -    await (await (await (await (await asyncio.sleep(1)))))
-+    await (await (await (await (await (asyncio.sleep(1))))))
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- async def main():
+-async def main():
+-    await (yield)
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-import asyncio
+NOT_YET_IMPLEMENTED_StmtImport
 
 
 # Control example
-async def main():
-    await asyncio.sleep(1)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Remove brackets for short coroutine/task
-async def main():
-    await (asyncio.sleep(1))
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (
-        asyncio.sleep(1)
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (asyncio.sleep(1)
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Check comments
-async def main():
-    await (  # Hello
-        asyncio.sleep(1)
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (
-        asyncio.sleep(1)  # Hello
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (
-        asyncio.sleep(1)
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Long lines
-async def main():
-    await asyncio.gather(asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1))
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Same as above but with magic trailing comma in function
-async def main():
-    await asyncio.gather(asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1), asyncio.sleep(1),)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Cr@zY Br@ck3Tz
-async def main():
-    await (
-        (((((((((((((
-        (((        (((
-        (((         (((
-        (((         (((
-        (((        (((
-        ((black(1)))
-        )))        )))
-        )))         )))
-        )))         )))
-        )))        )))
-        )))))))))))))
-    )
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # Keep brackets around non power operations and nested awaits
-async def main():
-    await (set_of_tasks | other_set)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (await asyncio.sleep(1))
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # It's awaits all the way down...
-async def main():
-    await (await x)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (yield x)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (await (asyncio.sleep(1)))
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (await (await (await (await (asyncio.sleep(1))))))
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-async def main():
-    await (yield)
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__remove_except_parens_py.snap

@@ -48,85 +48,69 @@ except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.ov
 ```diff
 --- Black
 +++ Ruff
-@@ -1,42 +1,27 @@
+@@ -1,42 +1,9 @@
  # These brackets are redundant, therefore remove.
- try:
-     a.something
+-try:
+-    a.something
 -except AttributeError as err:
-+except (AttributeError) as err:
-     raise err
+-    raise err
 -
 -# This is tuple of exceptions.
 -# Although this could be replaced with just the exception,
 -# we do not remove brackets to preserve AST.
- try:
-     a.something
- except (AttributeError,) as err:
-     raise err
+-try:
+-    a.something
+-except (AttributeError,) as err:
+-    raise err
 -
 -# This is a tuple of exceptions. Do not remove brackets.
- try:
-     a.something
- except (AttributeError, ValueError) as err:
-     raise err
+-try:
+-    a.something
+-except (AttributeError, ValueError) as err:
+-    raise err
 -
 -# Test long variants.
- try:
-     a.something
+-try:
+-    a.something
 -except (
 -    some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error
 -) as err:
-+except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error) as err:
-     raise err
+-    raise err
++NOT_YET_IMPLEMENTED_StmtTry
++NOT_YET_IMPLEMENTED_StmtTry
++NOT_YET_IMPLEMENTED_StmtTry
++NOT_YET_IMPLEMENTED_StmtTry
  
- try:
-     a.something
+-try:
+-    a.something
 -except (
 -    some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error,
 -) as err:
-+except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error,) as err:
-     raise err
+-    raise err
++NOT_YET_IMPLEMENTED_StmtTry
  
- try:
-     a.something
+-try:
+-    a.something
 -except (
 -    some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error,
 -    some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error,
 -) as err:
-+except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error, some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error) as err:
-     raise err
+-    raise err
++NOT_YET_IMPLEMENTED_StmtTry
 ```
 
 ## Ruff Output
 
 ```py
 # These brackets are redundant, therefore remove.
-try:
-    a.something
-except (AttributeError) as err:
-    raise err
-try:
-    a.something
-except (AttributeError,) as err:
-    raise err
-try:
-    a.something
-except (AttributeError, ValueError) as err:
-    raise err
-try:
-    a.something
-except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error) as err:
-    raise err
+NOT_YET_IMPLEMENTED_StmtTry
+NOT_YET_IMPLEMENTED_StmtTry
+NOT_YET_IMPLEMENTED_StmtTry
+NOT_YET_IMPLEMENTED_StmtTry
 
-try:
-    a.something
-except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error,) as err:
-    raise err
+NOT_YET_IMPLEMENTED_StmtTry
 
-try:
-    a.something
-except (some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error, some.really.really.really.looooooooooooooooooooooooooooooooong.module.over89.chars.Error) as err:
-    raise err
+NOT_YET_IMPLEMENTED_StmtTry
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__remove_for_brackets_py.snap

@@ -32,23 +32,25 @@ for (((((k, v))))) in d.items():
 ```diff
 --- Black
 +++ Ruff
-@@ -1,5 +1,5 @@
+@@ -1,27 +1,13 @@
  # Only remove tuple brackets after `for`
 -for k, v in d.items():
-+for (k, v) in d.items():
-     print(k, v)
+-    print(k, v)
++NOT_YET_IMPLEMENTED_StmtFor
  
  # Don't touch tuple brackets after `in`
-@@ -8,20 +8,12 @@
-         module._verify_python3_env = lambda: None
+-for module in (core, _unicodefun):
+-    if hasattr(module, "_verify_python3_env"):
+-        module._verify_python3_env = lambda: None
++NOT_YET_IMPLEMENTED_StmtFor
  
  # Brackets remain for long for loop lines
 -for (
 -    why_would_anyone_choose_to_name_a_loop_variable_with_a_name_this_long,
 -    i_dont_know_but_we_should_still_check_the_behaviour_if_they_do,
 -) in d.items():
-+for (why_would_anyone_choose_to_name_a_loop_variable_with_a_name_this_long, i_dont_know_but_we_should_still_check_the_behaviour_if_they_do) in d.items():
-     print(k, v)
+-    print(k, v)
++NOT_YET_IMPLEMENTED_StmtFor
  
 -for (
 -    k,
@@ -56,37 +58,31 @@ for (((((k, v))))) in d.items():
 -) in (
 -    dfkasdjfldsjflkdsjflkdsjfdslkfjldsjfgkjdshgkljjdsfldgkhsdofudsfudsofajdslkfjdslkfjldisfjdffjsdlkfjdlkjjkdflskadjldkfjsalkfjdasj.items()
 -):
-+for (k, v) in dfkasdjfldsjflkdsjflkdsjfdslkfjldsjfgkjdshgkljjdsfldgkhsdofudsfudsofajdslkfjdslkfjldisfjdffjsdlkfjdlkjjkdflskadjldkfjsalkfjdasj.items():
-     print(k, v)
+-    print(k, v)
++NOT_YET_IMPLEMENTED_StmtFor
  
  # Test deeply nested brackets
 -for k, v in d.items():
-+for (((((k, v))))) in d.items():
-     print(k, v)
+-    print(k, v)
++NOT_YET_IMPLEMENTED_StmtFor
 ```
 
 ## Ruff Output
 
 ```py
 # Only remove tuple brackets after `for`
-for (k, v) in d.items():
-    print(k, v)
+NOT_YET_IMPLEMENTED_StmtFor
 
 # Don't touch tuple brackets after `in`
-for module in (core, _unicodefun):
-    if hasattr(module, "_verify_python3_env"):
-        module._verify_python3_env = lambda: None
+NOT_YET_IMPLEMENTED_StmtFor
 
 # Brackets remain for long for loop lines
-for (why_would_anyone_choose_to_name_a_loop_variable_with_a_name_this_long, i_dont_know_but_we_should_still_check_the_behaviour_if_they_do) in d.items():
-    print(k, v)
+NOT_YET_IMPLEMENTED_StmtFor
 
-for (k, v) in dfkasdjfldsjflkdsjflkdsjfdslkfjldsjfgkjdshgkljjdsfldgkhsdofudsfudsofajdslkfjdslkfjldisfjdffjsdlkfjdlkjjkdflskadjldkfjsalkfjdasj.items():
-    print(k, v)
+NOT_YET_IMPLEMENTED_StmtFor
 
 # Test deeply nested brackets
-for (((((k, v))))) in d.items():
-    print(k, v)
+NOT_YET_IMPLEMENTED_StmtFor
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__remove_newline_after_code_block_open_py.snap

@@ -121,200 +121,168 @@ with open("/path/to/file.txt", mode="r") as read_file:
 ```diff
 --- Black
 +++ Ruff
-@@ -2,20 +2,26 @@
+@@ -1,78 +1,56 @@
+-import random
++NOT_YET_IMPLEMENTED_StmtImport
  
  
- def foo1():
-+
-     print("The newline above me should be deleted!")
+-def foo1():
+-    print("The newline above me should be deleted!")
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def foo2():
-+
-+
-+
-     print("All the newlines above me should be deleted!")
+-def foo2():
+-    print("All the newlines above me should be deleted!")
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def foo3():
-+
-     print("No newline above me!")
+-def foo3():
+-    print("No newline above me!")
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
-     print("There is a newline above me, and that's OK!")
+-    print("There is a newline above me, and that's OK!")
+ 
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+-def foo4():
+-    # There is a comment here
+ 
+-    print("The newline above me should not be deleted!")
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- def foo4():
-+
-     # There is a comment here
- 
-     print("The newline above me should not be deleted!")
-@@ -23,27 +29,39 @@
- 
- class Foo:
-     def bar(self):
-+
-         print("The newline above me should be deleted!")
+-class Foo:
+-    def bar(self):
+-        print("The newline above me should be deleted!")
++NOT_YET_IMPLEMENTED_StmtFor
  
  
- for i in range(5):
-+
-     print(f"{i}) The line above me should be removed!")
+-for i in range(5):
+-    print(f"{i}) The line above me should be removed!")
++NOT_YET_IMPLEMENTED_StmtFor
  
  
- for i in range(5):
-+
-+
-+
-     print(f"{i}) The lines above me should be removed!")
+-for i in range(5):
+-    print(f"{i}) The lines above me should be removed!")
++NOT_YET_IMPLEMENTED_StmtFor
  
  
- for i in range(5):
-+
-     for j in range(7):
-+
-         print(f"{i}) The lines above me should be removed!")
+-for i in range(5):
+-    for j in range(7):
+-        print(f"{i}) The lines above me should be removed!")
++NOT_YET_IMPLEMENTED_StmtIf
  
  
- if random.randint(0, 3) == 0:
-+
-     print("The new line above me is about to be removed!")
+-if random.randint(0, 3) == 0:
+-    print("The new line above me is about to be removed!")
+-
+-
+-if random.randint(0, 3) == 0:
+-    print("The new lines above me is about to be removed!")
++NOT_YET_IMPLEMENTED_StmtIf
  
  
- if random.randint(0, 3) == 0:
-+
-+
-+
-+
-     print("The new lines above me is about to be removed!")
+-if random.randint(0, 3) == 0:
+-    if random.uniform(0, 1) > 0.5:
+-        print("Two lines above me are about to be removed!")
++NOT_YET_IMPLEMENTED_StmtIf
  
  
-@@ -66,13 +84,19 @@
+-while True:
+-    print("The newline above me should be deleted!")
++while NOT_YET_IMPLEMENTED_ExprConstant:
++    NOT_YET_IMPLEMENTED_ExprCall
  
  
- with open("/path/to/file.txt", mode="w") as file:
-+
-     file.write("The new line above me is about to be removed!")
+-while True:
+-    print("The newlines above me should be deleted!")
++while NOT_YET_IMPLEMENTED_ExprConstant:
++    NOT_YET_IMPLEMENTED_ExprCall
  
  
- with open("/path/to/file.txt", mode="w") as file:
-+
-+
-+
-     file.write("The new lines above me is about to be removed!")
+-while True:
+-    while False:
+-        print("The newlines above me should be deleted!")
++while NOT_YET_IMPLEMENTED_ExprConstant:
++    while NOT_YET_IMPLEMENTED_ExprConstant:
++        NOT_YET_IMPLEMENTED_ExprCall
  
  
- with open("/path/to/file.txt", mode="r") as read_file:
-+
-     with open("/path/to/output_file.txt", mode="w") as write_file:
-+
-         write_file.writelines(read_file.readlines())
+-with open("/path/to/file.txt", mode="w") as file:
+-    file.write("The new line above me is about to be removed!")
++NOT_YET_IMPLEMENTED_StmtWith
+ 
+ 
+-with open("/path/to/file.txt", mode="w") as file:
+-    file.write("The new lines above me is about to be removed!")
++NOT_YET_IMPLEMENTED_StmtWith
+ 
+ 
+-with open("/path/to/file.txt", mode="r") as read_file:
+-    with open("/path/to/output_file.txt", mode="w") as write_file:
+-        write_file.writelines(read_file.readlines())
++NOT_YET_IMPLEMENTED_StmtWith
 ```
 
 ## Ruff Output
 
 ```py
-import random
+NOT_YET_IMPLEMENTED_StmtImport
 
 
-def foo1():
-
-    print("The newline above me should be deleted!")
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo2():
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-
-    print("All the newlines above me should be deleted!")
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo3():
-
-    print("No newline above me!")
-
-    print("There is a newline above me, and that's OK!")
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo4():
-
-    # There is a comment here
-
-    print("The newline above me should not be deleted!")
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class Foo:
-    def bar(self):
-
-        print("The newline above me should be deleted!")
+NOT_YET_IMPLEMENTED_StmtFor
 
 
-for i in range(5):
-
-    print(f"{i}) The line above me should be removed!")
+NOT_YET_IMPLEMENTED_StmtFor
 
 
-for i in range(5):
+NOT_YET_IMPLEMENTED_StmtFor
 
 
-
-    print(f"{i}) The lines above me should be removed!")
+NOT_YET_IMPLEMENTED_StmtIf
 
 
-for i in range(5):
-
-    for j in range(7):
-
-        print(f"{i}) The lines above me should be removed!")
+NOT_YET_IMPLEMENTED_StmtIf
 
 
-if random.randint(0, 3) == 0:
-
-    print("The new line above me is about to be removed!")
+NOT_YET_IMPLEMENTED_StmtIf
 
 
-if random.randint(0, 3) == 0:
+while NOT_YET_IMPLEMENTED_ExprConstant:
+    NOT_YET_IMPLEMENTED_ExprCall
 
 
+while NOT_YET_IMPLEMENTED_ExprConstant:
+    NOT_YET_IMPLEMENTED_ExprCall
 
 
-    print("The new lines above me is about to be removed!")
+while NOT_YET_IMPLEMENTED_ExprConstant:
+    while NOT_YET_IMPLEMENTED_ExprConstant:
+        NOT_YET_IMPLEMENTED_ExprCall
 
 
-if random.randint(0, 3) == 0:
-    if random.uniform(0, 1) > 0.5:
-        print("Two lines above me are about to be removed!")
+NOT_YET_IMPLEMENTED_StmtWith
 
 
-while True:
-    print("The newline above me should be deleted!")
+NOT_YET_IMPLEMENTED_StmtWith
 
 
-while True:
-    print("The newlines above me should be deleted!")
-
-
-while True:
-    while False:
-        print("The newlines above me should be deleted!")
-
-
-with open("/path/to/file.txt", mode="w") as file:
-
-    file.write("The new line above me is about to be removed!")
-
-
-with open("/path/to/file.txt", mode="w") as file:
-
-
-
-    file.write("The new lines above me is about to be removed!")
-
-
-with open("/path/to/file.txt", mode="r") as read_file:
-
-    with open("/path/to/output_file.txt", mode="w") as write_file:
-
-        write_file.writelines(read_file.readlines())
+NOT_YET_IMPLEMENTED_StmtWith
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__remove_parens_py.snap

@@ -68,71 +68,75 @@ def example8():
 ```diff
 --- Black
 +++ Ruff
-@@ -1,5 +1,5 @@
+@@ -1,85 +1,37 @@
 -x = 1
 -x = 1.2
-+x = (1)
-+x = (1.2)
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
- data = (
-     "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-@@ -11,75 +11,47 @@
-         try:
-             if report_host:
-                 data = (
+-data = (
+-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+-).encode()
++NOT_YET_IMPLEMENTED_StmtAssign
+ 
+ 
+-async def show_status():
+-    while True:
+-        try:
+-            if report_host:
+-                data = (
 -                    f"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
 -                ).encode()
-+                   f"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-+               ).encode()
-         except Exception as e:
-             pass
+-        except Exception as e:
+-            pass
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
  
  
- def example():
+-def example():
 -    return "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-+    return (("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example1():
+-def example1():
 -    return 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111
-+    return ((1111111111111111111111111111111111111111111111111111111111111111111111111111111111111))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example1point5():
+-def example1point5():
 -    return 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111
-+    return ((((((1111111111111111111111111111111111111111111111111111111111111111111111111111111111111))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example2():
+-def example2():
 -    return (
 -        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
 -    )
-+    return (("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example3():
+-def example3():
 -    return (
 -        1111111111111111111111111111111111111111111111111111111111111111111111111111111
 -    )
-+    return ((1111111111111111111111111111111111111111111111111111111111111111111111111111111))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example4():
+-def example4():
 -    return True
-+    return ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((True))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example5():
+-def example5():
 -    return ()
-+    return ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((()))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example6():
+-def example6():
 -    return {a: a for a in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]}
-+    return ((((((((({a:a for a in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]})))))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example7():
+-def example7():
 -    return {
 -        a: a
 -        for a in [
@@ -158,74 +162,54 @@ def example8():
 -            20000000000000000000,
 -        ]
 -    }
-+    return ((((((((({a:a for a in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20000000000000000000]})))))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def example8():
+-def example8():
 -    return None
-+    return (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((None)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
-x = (1)
-x = (1.2)
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
-data = (
-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-).encode()
+NOT_YET_IMPLEMENTED_StmtAssign
 
 
-async def show_status():
-    while True:
-        try:
-            if report_host:
-                data = (
-                   f"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-               ).encode()
-        except Exception as e:
-            pass
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
-def example():
-    return (("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example1():
-    return ((1111111111111111111111111111111111111111111111111111111111111111111111111111111111111))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example1point5():
-    return ((((((1111111111111111111111111111111111111111111111111111111111111111111111111111111111111))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example2():
-    return (("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example3():
-    return ((1111111111111111111111111111111111111111111111111111111111111111111111111111111))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example4():
-    return ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((True))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example5():
-    return ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((()))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example6():
-    return ((((((((({a:a for a in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]})))))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example7():
-    return ((((((((({a:a for a in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20000000000000000000]})))))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def example8():
-    return (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((None)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__return_annotation_brackets_py.snap

@@ -101,78 +101,67 @@ def foo() -> tuple[int, int, int,]:
 ```diff
 --- Black
 +++ Ruff
-@@ -1,33 +1,41 @@
+@@ -1,120 +1,65 @@
  # Control
- def double(a: int) -> int:
+-def double(a: int) -> int:
 -    return 2 * a
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Remove the brackets
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (int):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Some newline variations
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (
-+    int):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (int
-+):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (
-+    int
-+):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Don't lose the comments
 -def double(a: int) -> int:  # Hello
 -    return 2 * a
-+def double(a: int) -> ( # Hello
-+    int
-+):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def double(a: int) -> int:  # Hello
 -    return 2 * a
-+def double(a: int) -> (
-+    int # Hello
-+):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Really long annotations
-@@ -37,84 +45,62 @@
-     return 2
+-def foo() -> (
+-    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
+-):
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def foo() -> (
 -    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -):
-+def foo() -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def foo() -> (
 -    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -    | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -):
-+def foo() -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def foo(
@@ -180,8 +169,8 @@ def foo() -> tuple[int, int, int,]:
 -    b: int,
 -    c: int,
 -) -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-+def foo(a: int, b: int, c: int,) -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def foo(
@@ -192,8 +181,8 @@ def foo() -> tuple[int, int, int,]:
 -    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -    | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -):
-+def foo(a: int, b: int, c: int,) -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Split args but no need to split return
@@ -202,45 +191,33 @@ def foo() -> tuple[int, int, int,]:
 -    b: int,
 -    c: int,
 -) -> int:
-+def foo(a: int, b: int, c: int,) -> int:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Deeply nested brackets
  # with *interesting* spacing
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (((((int))))):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def double(a: int) -> int:
 -    return 2 * a
-+def double(a: int) -> (
-+    (  (
-+        ((int)
-+         )
-+           )
-+            )
-+        ):
-+    return 2*a
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
- def foo() -> (
-+    (  (
-     intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
+-def foo() -> (
+-    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
 -):
-+)
-+)):
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Return type with commas
 -def foo() -> tuple[int, int, int]:
-+def foo() -> (
-+    tuple[int, int, int]
-+):
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -def foo() -> (
@@ -250,8 +227,8 @@ def foo() -> tuple[int, int, int,]:
 -        loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong,
 -    ]
 -):
-+def foo() -> tuple[loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong, loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong, loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong]:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
  # Magic trailing comma example
@@ -262,119 +239,78 @@ def foo() -> tuple[int, int, int,]:
 -        int,
 -    ]
 -):
-+def foo() -> tuple[int, int, int,]:
-     return 2
+-    return 2
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
 
 ```py
 # Control
-def double(a: int) -> int:
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Remove the brackets
-def double(a: int) -> (int):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Some newline variations
-def double(a: int) -> (
-    int):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def double(a: int) -> (int
-):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def double(a: int) -> (
-    int
-):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Don't lose the comments
-def double(a: int) -> ( # Hello
-    int
-):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def double(a: int) -> (
-    int # Hello
-):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Really long annotations
-def foo() -> (
-    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
-):
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo() -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo() -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo(a: int, b: int, c: int,) -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo(a: int, b: int, c: int,) -> intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds | intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Split args but no need to split return
-def foo(a: int, b: int, c: int,) -> int:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Deeply nested brackets
 # with *interesting* spacing
-def double(a: int) -> (((((int))))):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def double(a: int) -> (
-    (  (
-        ((int)
-         )
-           )
-            )
-        ):
-    return 2*a
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo() -> (
-    (  (
-    intsdfsafafafdfdsasdfsfsdfasdfafdsafdfdsfasdskdsdsfdsafdsafsdfdasfffsfdsfdsafafhdskfhdsfjdslkfdlfsdkjhsdfjkdshfkljds
-)
-)):
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Return type with commas
-def foo() -> (
-    tuple[int, int, int]
-):
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def foo() -> tuple[loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong, loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong, loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong]:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
 # Magic trailing comma example
-def foo() -> tuple[int, int, int,]:
-    return 2
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__skip_magic_trailing_comma_py.snap

@@ -60,114 +60,75 @@ func(
 ```diff
 --- Black
 +++ Ruff
-@@ -3,23 +3,45 @@
- b = tuple[int,]
+@@ -1,25 +1,25 @@
+ # We should not remove the trailing comma in a single-element subscript.
+-a: tuple[int,]
+-b = tuple[int,]
++NOT_YET_IMPLEMENTED_StmtAnnAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # But commas in multiple element subscripts should be removed.
 -c: tuple[int, int]
 -d = tuple[int, int]
-+c: tuple[int, int,]
-+d = tuple[int, int,]
++NOT_YET_IMPLEMENTED_StmtAnnAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # Remove commas for non-subscripts.
 -small_list = [1]
 -list_of_types = [tuple[int,]]
 -small_set = {1}
 -set_of_types = {tuple[int,]}
-+small_list = [1,]
-+list_of_types = [tuple[int,],]
-+small_set = {1,}
-+set_of_types = {tuple[int,],}
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # Except single element tuples
- small_tuple = (1,)
+-small_tuple = (1,)
++NOT_YET_IMPLEMENTED_StmtAssign
  
  # Trailing commas in multiple chained non-nested parens.
 -zero(one).two(three).four(five)
-+zero(
-+    one,
-+).two(
-+    three,
-+).four(
-+    five,
-+)
++NOT_YET_IMPLEMENTED_ExprCall
  
 -func1(arg1).func2(arg2).func3(arg3).func4(arg4).func5(arg5)
-+func1(arg1).func2(arg2,).func3(arg3).func4(arg4,).func5(arg5)
++NOT_YET_IMPLEMENTED_ExprCall
  
 -(a, b, c, d) = func1(arg1) and func2(arg2)
-+(
-+    a,
-+    b,
-+    c,
-+    d,
-+) = func1(
-+    arg1
-+) and func2(arg2)
++NOT_YET_IMPLEMENTED_StmtAssign
  
 -func(argument1, (one, two), argument4, argument5, argument6)
-+func(
-+    argument1,
-+    (
-+        one,
-+        two,
-+    ),
-+    argument4,
-+    argument5,
-+    argument6,
-+)
++NOT_YET_IMPLEMENTED_ExprCall
 ```
 
 ## Ruff Output
 
 ```py
 # We should not remove the trailing comma in a single-element subscript.
-a: tuple[int,]
-b = tuple[int,]
+NOT_YET_IMPLEMENTED_StmtAnnAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # But commas in multiple element subscripts should be removed.
-c: tuple[int, int,]
-d = tuple[int, int,]
+NOT_YET_IMPLEMENTED_StmtAnnAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # Remove commas for non-subscripts.
-small_list = [1,]
-list_of_types = [tuple[int,],]
-small_set = {1,}
-set_of_types = {tuple[int,],}
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # Except single element tuples
-small_tuple = (1,)
+NOT_YET_IMPLEMENTED_StmtAssign
 
 # Trailing commas in multiple chained non-nested parens.
-zero(
-    one,
-).two(
-    three,
-).four(
-    five,
-)
+NOT_YET_IMPLEMENTED_ExprCall
 
-func1(arg1).func2(arg2,).func3(arg3).func4(arg4,).func5(arg5)
+NOT_YET_IMPLEMENTED_ExprCall
 
-(
-    a,
-    b,
-    c,
-    d,
-) = func1(
-    arg1
-) and func2(arg2)
+NOT_YET_IMPLEMENTED_StmtAssign
 
-func(
-    argument1,
-    (
-        one,
-        two,
-    ),
-    argument4,
-    argument5,
-    argument6,
-)
+NOT_YET_IMPLEMENTED_ExprCall
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__slices_py.snap

@@ -76,127 +76,137 @@ x[
 ```diff
 --- Black
 +++ Ruff
-@@ -31,14 +31,17 @@
- ham[lower + offset : upper + offset]
+@@ -1,59 +1,37 @@
+-slice[a.b : c.d]
+-slice[d :: d + 1]
+-slice[d + 1 :: d]
+-slice[d::d]
+-slice[0]
+-slice[-1]
+-slice[:-1]
+-slice[::-1]
+-slice[:c, c - 1]
+-slice[c, c + 1, d::]
+-slice[ham[c::d] :: 1]
+-slice[ham[cheese**2 : -1] : 1 : 1, ham[1:2]]
+-slice[:-1:]
+-slice[lambda: None : lambda: None]
+-slice[lambda x, y, *args, really=2, **kwargs: None :, None::]
+-slice[1 or 2 : True and False]
+-slice[not so_simple : 1 < val <= 10]
+-slice[(1 for i in range(42)) : x]
+-slice[:: [i for i in range(42)]]
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
  
- slice[::, ::]
+ 
+-async def f():
+-    slice[await x : [i async for i in arange(42)] : 42]
++NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
+ 
+ 
+ # These are from PEP-8:
+-ham[1:9], ham[1:9:3], ham[:9:3], ham[1::3], ham[1:9:]
+-ham[lower:upper], ham[lower:upper:], ham[lower::step]
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprTuple
+ # ham[lower+offset : upper+offset]
+-ham[: upper_fn(x) : step_fn(x)], ham[:: step_fn(x)]
+-ham[lower + offset : upper + offset]
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprSubscript
+ 
+-slice[::, ::]
 -slice[
-+(
-+    slice[
-     # A
-     :
-     # B
-     :
-     # C
- ]
+-    # A
+-    :
+-    # B
+-    :
+-    # C
+-]
 -slice[
-+)
-+(
-+    slice[
-     # A
-     1:
-     # B
-@@ -46,8 +49,10 @@
-     # C
-     3
- ]
-+)
+-    # A
+-    1:
+-    # B
+-    2:
+-    # C
+-    3
+-]
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
  
 -slice[
-+(
-+    slice[
-     # A
-     1
-     + 2 :
-@@ -56,4 +61,11 @@
-     # C
-     4
- ]
+-    # A
+-    1
+-    + 2 :
+-    # B
+-    3 :
+-    # C
+-    4
+-]
 -x[1:2:3]  # A  # B  # C
-+)
-+(
-+    x[
-+    1:  # A
-+    2:  # B
-+    3  # C
-+]
-+)
++NOT_YET_IMPLEMENTED_ExprSubscript
++NOT_YET_IMPLEMENTED_ExprSubscript
 ```
 
 ## Ruff Output
 
 ```py
-slice[a.b : c.d]
-slice[d :: d + 1]
-slice[d + 1 :: d]
-slice[d::d]
-slice[0]
-slice[-1]
-slice[:-1]
-slice[::-1]
-slice[:c, c - 1]
-slice[c, c + 1, d::]
-slice[ham[c::d] :: 1]
-slice[ham[cheese**2 : -1] : 1 : 1, ham[1:2]]
-slice[:-1:]
-slice[lambda: None : lambda: None]
-slice[lambda x, y, *args, really=2, **kwargs: None :, None::]
-slice[1 or 2 : True and False]
-slice[not so_simple : 1 < val <= 10]
-slice[(1 for i in range(42)) : x]
-slice[:: [i for i in range(42)]]
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
 
 
-async def f():
-    slice[await x : [i async for i in arange(42)] : 42]
+NOT_YET_IMPLEMENTED_StmtAsyncFunctionDef
 
 
 # These are from PEP-8:
-ham[1:9], ham[1:9:3], ham[:9:3], ham[1::3], ham[1:9:]
-ham[lower:upper], ham[lower:upper:], ham[lower::step]
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprTuple
 # ham[lower+offset : upper+offset]
-ham[: upper_fn(x) : step_fn(x)], ham[:: step_fn(x)]
-ham[lower + offset : upper + offset]
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprSubscript
 
-slice[::, ::]
-(
-    slice[
-    # A
-    :
-    # B
-    :
-    # C
-]
-)
-(
-    slice[
-    # A
-    1:
-    # B
-    2:
-    # C
-    3
-]
-)
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
 
-(
-    slice[
-    # A
-    1
-    + 2 :
-    # B
-    3 :
-    # C
-    4
-]
-)
-(
-    x[
-    1:  # A
-    2:  # B
-    3  # C
-]
-)
+NOT_YET_IMPLEMENTED_ExprSubscript
+NOT_YET_IMPLEMENTED_ExprSubscript
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__string_prefixes_py.snap

@@ -33,25 +33,36 @@ def docstring_multiline():
 ```diff
 --- Black
 +++ Ruff
-@@ -1,13 +1,13 @@
+@@ -1,20 +1,16 @@
  #!/usr/bin/env python3
  
- name = "Łukasz"
+-name = "Łukasz"
 -(f"hello {name}", f"hello {name}")
 -(b"", b"")
 -("", "")
-+(f"hello {name}", F"hello {name}")
-+(b"", B"")
-+(u"", U"")
- (r"", R"")
+-(r"", R"")
++NOT_YET_IMPLEMENTED_StmtAssign
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprTuple
  
 -(rf"", rf"", Rf"", Rf"", rf"", rf"", Rf"", Rf"")
 -(rb"", rb"", Rb"", Rb"", rb"", rb"", Rb"", Rb"")
-+(rf"", fr"", Rf"", fR"", rF"", Fr"", RF"", FR"")
-+(rb"", br"", Rb"", bR"", rB"", Br"", RB"", BR"")
++NOT_YET_IMPLEMENTED_ExprTuple
++NOT_YET_IMPLEMENTED_ExprTuple
  
  
- def docstring_singleline():
+-def docstring_singleline():
+-    R"""2020 was one hell of a year. The good news is that we were able to"""
++NOT_YET_IMPLEMENTED_StmtFunctionDef
+ 
+ 
+-def docstring_multiline():
+-    R"""
+-    clear out all of the issues opened in that time :p
+-    """
++NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Ruff Output
@@ -59,24 +70,20 @@ def docstring_multiline():
 ```py
 #!/usr/bin/env python3
 
-name = "Łukasz"
-(f"hello {name}", F"hello {name}")
-(b"", B"")
-(u"", U"")
-(r"", R"")
+NOT_YET_IMPLEMENTED_StmtAssign
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprTuple
 
-(rf"", fr"", Rf"", fR"", rF"", Fr"", RF"", FR"")
-(rb"", br"", Rb"", bR"", rB"", Br"", RB"", BR"")
+NOT_YET_IMPLEMENTED_ExprTuple
+NOT_YET_IMPLEMENTED_ExprTuple
 
 
-def docstring_singleline():
-    R"""2020 was one hell of a year. The good news is that we were able to"""
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-def docstring_multiline():
-    R"""
-    clear out all of the issues opened in that time :p
-    """
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__torture_py.snap

@@ -42,16 +42,18 @@ assert (
 ```diff
 --- Black
 +++ Ruff
-@@ -2,18 +2,13 @@
+@@ -1,58 +1,20 @@
+ importA
  (
-     ()
-     << 0
+-    ()
+-    << 0
 -    ** 101234234242352525425252352352525234890264906820496920680926538059059209922523523525
-+    **101234234242352525425252352352525234890264906820496920680926538059059209922523523525
++    NOT_YET_IMPLEMENTED_ExprTuple
++    << NOT_YET_IMPLEMENTED_ExprConstant**NOT_YET_IMPLEMENTED_ExprConstant
  )  #
  
- assert sort_by_dependency(
-     {
+-assert sort_by_dependency(
+-    {
 -        "1": {"2", "3"},
 -        "2": {"2a", "2b"},
 -        "3": {"3a", "3b"},
@@ -59,23 +61,27 @@ assert (
 -        "2b": set(),
 -        "3a": set(),
 -        "3b": set(),
-+        "1": {"2", "3"}, "2": {"2a", "2b"}, "3": {"3a", "3b"},
-+        "2a": set(), "2b": set(), "3a": set(), "3b": set()
-     }
- ) == ["2a", "2b", "2", "3a", "3b", "3", "1"]
+-    }
+-) == ["2a", "2b", "2", "3a", "3b", "3", "1"]
++NOT_YET_IMPLEMENTED_StmtAssert
  
-@@ -25,34 +20,18 @@
- class A:
-     def foo(self):
-         for _ in range(10):
+ importA
+-0
+-0 ^ 0  #
++NOT_YET_IMPLEMENTED_ExprConstant
++NOT_YET_IMPLEMENTED_ExprConstant ^ NOT_YET_IMPLEMENTED_ExprConstant  #
+ 
+ 
+-class A:
+-    def foo(self):
+-        for _ in range(10):
 -            aaaaaaaaaaaaaaaaaaa = bbbbbbbbbbbbbbb.cccccccccc(
-+            aaaaaaaaaaaaaaaaaaa = bbbbbbbbbbbbbbb.cccccccccc(  # pylint: disable=no-member
-                 xxxxxxxxxxxx
+-                xxxxxxxxxxxx
 -            )  # pylint: disable=no-member
-+            )
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- def test(self, othr):
+-def test(self, othr):
 -    return 1 == 2 and (
 -        name,
 -        description,
@@ -95,19 +101,14 @@ assert (
 -        othr.meta_data,
 -        othr.schedule,
 -    )
-+    return (1 == 2 and
-+            (name, description, self.default, self.selected, self.auto_generated, self.parameters, self.meta_data, self.schedule) ==
-+            (name, description, othr.default, othr.selected, othr.auto_generated, othr.parameters, othr.meta_data, othr.schedule))
++NOT_YET_IMPLEMENTED_StmtFunctionDef
  
  
 -assert a_function(
 -    very_long_arguments_that_surpass_the_limit,
 -    which_is_eighty_eight_in_this_case_plus_a_bit_more,
 -) == {"x": "this need to pass the line limit as well", "b": "but only by a little bit"}
-+assert (
-+    a_function(very_long_arguments_that_surpass_the_limit, which_is_eighty_eight_in_this_case_plus_a_bit_more)
-+    == {"x": "this need to pass the line limit as well", "b": "but only by a little bit"}
-+)
++NOT_YET_IMPLEMENTED_StmtAssert
 ```
 
 ## Ruff Output
@@ -115,41 +116,24 @@ assert (
 ```py
 importA
 (
-    ()
-    << 0
-    **101234234242352525425252352352525234890264906820496920680926538059059209922523523525
+    NOT_YET_IMPLEMENTED_ExprTuple
+    << NOT_YET_IMPLEMENTED_ExprConstant**NOT_YET_IMPLEMENTED_ExprConstant
 )  #
 
-assert sort_by_dependency(
-    {
-        "1": {"2", "3"}, "2": {"2a", "2b"}, "3": {"3a", "3b"},
-        "2a": set(), "2b": set(), "3a": set(), "3b": set()
-    }
-) == ["2a", "2b", "2", "3a", "3b", "3", "1"]
+NOT_YET_IMPLEMENTED_StmtAssert
 
 importA
-0
-0 ^ 0  #
+NOT_YET_IMPLEMENTED_ExprConstant
+NOT_YET_IMPLEMENTED_ExprConstant ^ NOT_YET_IMPLEMENTED_ExprConstant  #
 
 
-class A:
-    def foo(self):
-        for _ in range(10):
-            aaaaaaaaaaaaaaaaaaa = bbbbbbbbbbbbbbb.cccccccccc(  # pylint: disable=no-member
-                xxxxxxxxxxxx
-            )
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-def test(self, othr):
-    return (1 == 2 and
-            (name, description, self.default, self.selected, self.auto_generated, self.parameters, self.meta_data, self.schedule) ==
-            (name, description, othr.default, othr.selected, othr.auto_generated, othr.parameters, othr.meta_data, othr.schedule))
+NOT_YET_IMPLEMENTED_StmtFunctionDef
 
 
-assert (
-    a_function(very_long_arguments_that_surpass_the_limit, which_is_eighty_eight_in_this_case_plus_a_bit_more)
-    == {"x": "this need to pass the line limit as well", "b": "but only by a little bit"}
-)
+NOT_YET_IMPLEMENTED_StmtAssert
 ```
 
 ## Black Output

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__black_test__trailing_comma_optional_parens1_py.snap

@@ -38,17 +38,16 @@ class A:
 ```diff
 --- Black
 +++ Ruff
-@@ -1,18 +1,11 @@
+@@ -1,34 +1,9 @@
 -if e1234123412341234.winerror not in (
 -    _winapi.ERROR_SEM_TIMEOUT,
 -    _winapi.ERROR_PIPE_BUSY,
 -) or _check_timeout(t):
-+if e1234123412341234.winerror not in (_winapi.ERROR_SEM_TIMEOUT,
-+                        _winapi.ERROR_PIPE_BUSY) or _check_timeout(t):
-     pass
+-    pass
++NOT_YET_IMPLEMENTED_StmtIf
  
- if x:
-     if y:
+-if x:
+-    if y:
 -        new_id = (
 -            max(
 -                Vegetable.objects.order_by("-id")[0].id,
@@ -56,52 +55,42 @@ class A:
 -            )
 -            + 1
 -        )
-+        new_id = max(Vegetable.objects.order_by('-id')[0].id,
-+                     Mineral.objects.order_by('-id')[0].id) + 1
++NOT_YET_IMPLEMENTED_StmtIf
  
  
- class X:
-@@ -21,7 +14,7 @@
-             "Your password must contain at least %(min_length)d character.",
-             "Your password must contain at least %(min_length)d characters.",
-             self.min_length,
+-class X:
+-    def get_help_text(self):
+-        return ngettext(
+-            "Your password must contain at least %(min_length)d character.",
+-            "Your password must contain at least %(min_length)d characters.",
+-            self.min_length,
 -        ) % {"min_length": self.min_length}
-+        ) % {'min_length': self.min_length}
++NOT_YET_IMPLEMENTED_StmtClassDef
  
  
- class A:
+-class A:
+-    def b(self):
+-        if self.connection.mysql_is_mariadb and (
+-            10,
+-            4,
+-            3,
+-        ) < self.connection.mysql_version < (10, 5, 2):
+-            pass
++NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Ruff Output
 
 ```py
-if e1234123412341234.winerror not in (_winapi.ERROR_SEM_TIMEOUT,
-                        _winapi.ERROR_PIPE_BUSY) or _check_timeout(t):
-    pass
+NOT_YET_IMPLEMENTED_StmtIf
 
-if x:
-    if y:
-        new_id = max(Vegetable.objects.order_by('-id')[0].id,
-                     Mineral.objects.order_by('-id')[0].id) + 1
+NOT_YET_IMPLEMENTED_StmtIf
 
 
-class X:
-    def get_help_text(self):
-        return ngettext(
-            "Your password must contain at least %(min_length)d character.",
-            "Your password must contain at least %(min_length)d characters.",
-            self.min_length,
-        ) % {'min_length': self.min_length}
+NOT_YET_IMPLEMENTED_StmtClassDef
 
 
-class A:
-    def b(self):
-        if self.connection.mysql_is_mariadb and (
-            10,
-            4,
-            3,
-        ) < self.connection.mysql_version < (10, 5, 2):
-            pass
+NOT_YET_IMPLEMENTED_StmtClassDef
 ```
 
 ## Black Output