Avoid extra parentheses in unary expressions (#7428)

## Summary

This PR applies a similar fix to unary expressions as in
https://github.com/astral-sh/ruff/pull/7424. Specifically, we only need
to parenthesize the entire operator if the operand itself doesn't have
parentheses, and requires parentheses.

Closes https://github.com/astral-sh/ruff/issues/7423.

## Test Plan

`cargo test`

No change in similarity.

Before:

| project | similarity index | total files | changed files |

|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99982 | 2760 | 37 |
| transformers | 0.99957 | 2587 | 399 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99923 | 648 | 18 |
| zulip | 0.99962 | 1437 | 22 |

After:

| project | similarity index | total files | changed files |

|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99982 | 2760 | 37 |
| transformers | 0.99957 | 2587 | 399 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99923 | 648 | 18 |
| zulip | 0.99962 | 1437 | 22 |

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

@@ -151,3 +151,13 @@ if (
   not  # comment
   a):
     ...
+
+# Regression test for: https://github.com/astral-sh/ruff/issues/7423
+if True:
+    if True:
+        if True:
+            if not yn_question(
+                Fore.RED
+                + "WARNING: Removing listed files. Do you really want to continue. yes/n)? "
+            ):
+                pass

crates/ruff_python_formatter/src/expression/expr_unary_op.rs

@@ -82,8 +82,10 @@ impl NeedsParentheses for ExprUnaryOp {
             context.source(),
         ) {
             OptionalParentheses::Never
+        } else if context.comments().has(self.operand.as_ref()) {
+            OptionalParentheses::Always
         } else {
-            OptionalParentheses::Multiline
+            self.operand.needs_parentheses(self.into(), context)
         }
     }
 }

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

@@ -157,6 +157,16 @@ if (
   not  # comment
   a):
     ...
+
+# Regression test for: https://github.com/astral-sh/ruff/issues/7423
+if True:
+    if True:
+        if True:
+            if not yn_question(
+                Fore.RED
+                + "WARNING: Removing listed files. Do you really want to continue. yes/n)? "
+            ):
+                pass
 ```
 
 ## Output
@@ -323,10 +333,18 @@ if (
 ):
     ...
 
-if (
+if not a:  # comment
-    not a  # comment
-):
     ...
+
+# Regression test for: https://github.com/astral-sh/ruff/issues/7423
+if True:
+    if True:
+        if True:
+            if not yn_question(
+                Fore.RED
+                + "WARNING: Removing listed files. Do you really want to continue. yes/n)? "
+            ):
+                pass
 ```