Range formatting: Fix invalid syntax after parenthesizing expression (#9751)

crates/ruff_python_formatter/resources/test/fixtures/ruff/range_formatting/end_of_file.py

@@ -0,0 +1 @@
+a + b<RANGE_START><RANGE_END>

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

@@ -0,0 +1,13 @@
+def needs_parentheses( ) -> bool:
+    return item.sizing_mode is None and <RANGE_START>item.width_policy == "auto" and item.height_policy == "automatic"<RANGE_END>
+
+def no_longer_needs_parentheses( ) -> bool:
+    return (
+        <RANGE_START>item.width_policy == "auto"
+        and item.height_policy == "automatic"<RANGE_END>
+    )
+
+
+def format_range_after_inserted_parens   ():
+    a and item.sizing_mode is None and item.width_policy == "auto" and item.height_policy == "automatic"<RANGE_START>
+    print("Format this" ) <RANGE_END>

crates/ruff_python_formatter/resources/test/fixtures/ruff/range_formatting/regressions.py

@@ -67,3 +67,19 @@ def convert_str(value: str) -> str:  # Trailing comment
 <RANGE_END>
 def test  ():
     pass
+
+
+def test_comment_indent():
+<RANGE_START># A misaligned comment<RANGE_END>
+    print("test")
+
+
+# This demonstrates the use case where a user inserts a new function or class after an existing function.
+# In this case, we should avoid formatting the node that directly precedes the new function/class.
+# However, the problem is that the preceding node **must** be formatted to determine the whitespace between the two statements.
+def test_start ():
+    print("Ideally this gets not reformatted" )
+
+<RANGE_START>
+def new_function_inserted_after_test_start ():
+    print("This should get formatted" )<RANGE_END>