Attach dangling comments to the comprehension instead of the if or iter nodes (#7693)

crates/ruff_python_formatter/src/expression/expr_compare.rs

@@ -20,10 +20,11 @@ impl FormatNodeRule<ExprCompare> for FormatExprCompare {
 
     fn fmt_dangling_comments(
         &self,
-        _dangling_comments: &[SourceComment],
+        dangling_comments: &[SourceComment],
         _f: &mut PyFormatter,
     ) -> FormatResult<()> {
         // Node can not have dangling comments
+        debug_assert!(dangling_comments.is_empty());
         Ok(())
     }
 }