Fix unnecessary space around power op in overlong f-string expressions (#14489)

crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/fstring.py

@@ -346,3 +346,6 @@ _ = (
     f'This string uses double quotes in an expression {"it's a quote"}'
     f'This f-string does not use any quotes.'
 )
+
+# Regression test for https://github.com/astral-sh/ruff/issues/14487
+f"aaaaaaaaaaaaaaaaaaaaaaaaaa {10**27} bbbbbbbbbbbbbbbbbbbbbbbbbb ccccccccccccccccccccccccc"

crates/ruff_python_formatter/src/builders.rs

@@ -1,7 +1,7 @@
 use ruff_formatter::{write, Argument, Arguments};
 use ruff_text_size::{Ranged, TextRange, TextSize};
 
-use crate::context::{FStringState, NodeLevel, WithNodeLevel};
+use crate::context::{NodeLevel, WithNodeLevel};
 use crate::other::commas::has_magic_trailing_comma;
 use crate::prelude::*;
 
@@ -206,16 +206,6 @@ impl<'fmt, 'ast, 'buf> JoinCommaSeparatedBuilder<'fmt, 'ast, 'buf> {
 
     pub(crate) fn finish(&mut self) -> FormatResult<()> {
         self.result.and_then(|()| {
-            // If the formatter is inside an f-string expression element, and the layout
-            // is flat, then we don't need to add a trailing comma.
-            if let FStringState::InsideExpressionElement(context) =
-                self.fmt.context().f_string_state()
-            {
-                if !context.can_contain_line_breaks() {
-                    return Ok(());
-                }
-            }
-
             if let Some(last_end) = self.entries.position() {
                 let magic_trailing_comma = has_magic_trailing_comma(
                     TextRange::new(last_end, self.sequence_end),

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

@@ -353,6 +353,9 @@ _ = (
     f'This string uses double quotes in an expression {"it's a quote"}'
     f'This f-string does not use any quotes.'
 )
+
+# Regression test for https://github.com/astral-sh/ruff/issues/14487
+f"aaaaaaaaaaaaaaaaaaaaaaaaaa {10**27} bbbbbbbbbbbbbbbbbbbbbbbbbb ccccccccccccccccccccccccc"
 ```
 
 ## Outputs
@@ -728,6 +731,9 @@ _ = (
     f"This string uses double quotes in an expression {"it's a quote"}"
     f"This f-string does not use any quotes."
 )
+
+# Regression test for https://github.com/astral-sh/ruff/issues/14487
+f"aaaaaaaaaaaaaaaaaaaaaaaaaa {10**27} bbbbbbbbbbbbbbbbbbbbbbbbbb ccccccccccccccccccccccccc"
 ```
 
 
@@ -1091,6 +1097,9 @@ _ = (
     f'This string uses double quotes in an expression {"it's a quote"}'
     f'This f-string does not use any quotes.'
 )
+
+# Regression test for https://github.com/astral-sh/ruff/issues/14487
+f"aaaaaaaaaaaaaaaaaaaaaaaaaa {10**27} bbbbbbbbbbbbbbbbbbbbbbbbbb ccccccccccccccccccccccccc"
 ```
 
 
@@ -1444,7 +1453,7 @@ _ = (
      # comment 27
      # comment 28
  } woah {x}"
-@@ -318,27 +330,27 @@
+@@ -318,29 +330,29 @@
          if indent2:
              foo = f"""hello world
  hello {
@@ -1490,4 +1499,6 @@ _ = (
 +    f"This string uses double quotes in an expression {"it's a quote"}"
 +    f"This f-string does not use any quotes."
  )
+ 
+ # Regression test for https://github.com/astral-sh/ruff/issues/14487
 ```