Avoid breaking call chains unnecessarily (#6488)

## Summary

This PR attempts to fix the formatting of the following expression:

```python
max_message_id = (
    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id
)
```

Specifically, Black preserves _that_ formatting, while we do:

```python
max_message_id = (
    Message.objects.filter(recipient=recipient)
    .order_by("id")
    .reverse()[0]
    .id
)
```

The fix here is to add a group around the entire call chain.

## Test Plan

Before:

- `zulip`: 0.99702
- `django`: 0.99784
- `warehouse`: 0.99585
- `build`: 0.75623
- `transformers`: 0.99470
- `cpython`: 0.75989
- `typeshed`: 0.74853

After:

- `zulip`: 0.99703
- `django`: 0.99791
- `warehouse`: 0.99586
- `build`: 0.75623
- `transformers`: 0.99470
- `cpython`: 0.75989
- `typeshed`: 0.74853

crates/ruff_python_formatter/resources/test/fixtures/ruff/parentheses/call_chains.py

@@ -154,4 +154,10 @@ zero(
     five,
 )
 
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id
+)
 
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id()
+)

crates/ruff_python_formatter/src/expression/expr_attribute.rs

@@ -35,6 +35,7 @@ impl FormatNodeRule<ExprAttribute> for FormatExprAttribute {
 
         let call_chain_layout = self.call_chain_layout.apply_in_node(item, f);
 
+        let format_inner = format_with(|f: &mut PyFormatter| {
             let needs_parentheses = matches!(
                 value.as_ref(),
                 Expr::Constant(ExprConstant {
@@ -45,8 +46,8 @@ impl FormatNodeRule<ExprAttribute> for FormatExprAttribute {
 
             let comments = f.context().comments().clone();
             let dangling_comments = comments.dangling_comments(item);
-        let leading_attribute_comments_start =
-            dangling_comments.partition_point(|comment| comment.line_position().is_end_of_line());
+            let leading_attribute_comments_start = dangling_comments
+                .partition_point(|comment| comment.line_position().is_end_of_line());
             let (trailing_dot_comments, leading_attribute_comments) =
                 dangling_comments.split_at(leading_attribute_comments_start);
 
@@ -73,7 +74,8 @@ impl FormatNodeRule<ExprAttribute> for FormatExprAttribute {
                     }
                     _ => {
                         // This matches [`CallChainLayout::from_expression`]
-                    if is_expression_parenthesized(value.as_ref().into(), f.context().source()) {
+                        if is_expression_parenthesized(value.as_ref().into(), f.context().source())
+                        {
                             value.format().with_options(Parentheses::Always).fmt(f)?;
                             // Format the dot on its own line
                             soft_line_break().fmt(f)?;
@@ -135,6 +137,15 @@ impl FormatNodeRule<ExprAttribute> for FormatExprAttribute {
                     ]
                 )
             }
+        });
+
+        let is_call_chain_root = self.call_chain_layout == CallChainLayout::Default
+            && call_chain_layout == CallChainLayout::Fluent;
+        if is_call_chain_root {
+            write!(f, [group(&format_inner)])
+        } else {
+            write!(f, [format_inner])
+        }
     }
 
     fn fmt_dangling_comments(

crates/ruff_python_formatter/tests/snapshots/format@parentheses__call_chains.py.snap

@@ -160,7 +160,13 @@ zero(
     five,
 )
 
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id
+)
 
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id()
+)
 ```
 
 ## Output
@@ -334,6 +340,14 @@ zero(
 ).four(
     five,
 )
+
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id
+)
+
+max_message_id = (
+    Message.objects.filter(recipient=recipient).order_by("id").reverse()[0].id()
+)
 ```