Fix 'MarkVerbatimCommentsAsFormattedVisitor' is unused warning in rel…

…ease builds (#11304)

crates/ruff_python_formatter/src/comments/mod.rs

@@ -96,7 +96,6 @@ pub(crate) use format::{
     leading_alternate_branch_comments, leading_comments, leading_node_comments, trailing_comments,
 };
 use ruff_formatter::{SourceCode, SourceCodeSlice};
-use ruff_python_ast::visitor::preorder::{PreorderVisitor, TraversalSignal};
 use ruff_python_ast::AnyNodeRef;
 use ruff_python_trivia::{CommentLinePosition, CommentRanges, SuppressionKind};
 use ruff_source_file::Locator;
@@ -407,6 +406,20 @@ impl<'a> Comments<'a> {
     /// normally if `node` is the first or last node of a suppression range.
     #[cfg(debug_assertions)]
     pub(crate) fn mark_verbatim_node_comments_formatted(&self, node: AnyNodeRef) {
+        use ruff_python_ast::visitor::preorder::{PreorderVisitor, TraversalSignal};
+
+        struct MarkVerbatimCommentsAsFormattedVisitor<'a>(&'a Comments<'a>);
+
+        impl<'a> PreorderVisitor<'a> for MarkVerbatimCommentsAsFormattedVisitor<'a> {
+            fn enter_node(&mut self, node: AnyNodeRef<'a>) -> TraversalSignal {
+                for comment in self.0.leading_dangling_trailing(node) {
+                    comment.mark_formatted();
+                }
+
+                TraversalSignal::Traverse
+            }
+        }
+
         for dangling in self.dangling(node) {
             dangling.mark_formatted();
         }
@@ -452,18 +465,6 @@ struct CommentsData<'a> {
     comment_ranges: &'a CommentRanges,
 }
 
-struct MarkVerbatimCommentsAsFormattedVisitor<'a>(&'a Comments<'a>);
-
-impl<'a> PreorderVisitor<'a> for MarkVerbatimCommentsAsFormattedVisitor<'a> {
-    fn enter_node(&mut self, node: AnyNodeRef<'a>) -> TraversalSignal {
-        for comment in self.0.leading_dangling_trailing(node) {
-            comment.mark_formatted();
-        }
-
-        TraversalSignal::Traverse
-    }
-}
-
 pub(crate) fn has_skip_comment(trailing_comments: &[SourceComment], source: &str) -> bool {
     trailing_comments.iter().any(|comment| {
         comment.line_position().is_end_of_line()