do less work for indenting comment blocks (#469)

froydnj · web-flow · commit bc3b5856ce4b · 2025-03-07T04:19:02.000-05:00
diff --git a/librubyfmt/src/comment_block.rs b/librubyfmt/src/comment_block.rs
@@ -36,11 +36,12 @@ impl CommentBlock {
     }
 
     pub fn apply_spaces(mut self, indent_depth: ColNumber) -> Self {
+        let indent = str::repeat(" ", indent_depth as _);
         for comment in &mut self.comments {
             // Ignore empty strings -- these represent blank lines between
             // groups of comments
             if !comment.is_empty() {
-                *comment = str::repeat(" ", indent_depth as _) + comment
+                comment.insert_str(0, &indent);
             }
         }
         self

Original file line number	Diff line number	Diff line change
`@@ -36,11 +36,12 @@ impl CommentBlock {`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`pub fn apply_spaces(mut self, indent_depth: ColNumber) -> Self {`
	`39`	`+ let indent = str::repeat(" ", indent_depth as _);`
`39`	`40`	`for comment in &mut self.comments {`
`40`	`41`	`// Ignore empty strings -- these represent blank lines between`
`41`	`42`	`// groups of comments`
`42`	`43`	`if !comment.is_empty() {`
`43`		`- *comment = str::repeat(" ", indent_depth as _) + comment`
	`44`	`+ comment.insert_str(0, &indent);`
`44`	`45`	`}`
`45`	`46`	`}`
`46`	`47`	`self`