avoid trimStart twice

Author: Janther

src/slang-printers/print-block-comment.ts

@@ -5,31 +5,32 @@ import type { BlockComment } from '../slang-nodes/types.d.ts';
 
 const { hardline, join, literalline } = doc.builders;
 
-function isIndentableBlockComment(lines: string[]): boolean {
-  // If the comment has multiple lines and every line starts with a star
-  // we can fix the indentation of each line.
-  return lines.length > 1 && lines.every((line) => line.trimStart()[0] === '*');
-}
-
 function printIndentableBlockComment(lines: string[]): Doc {
   return join(
     hardline,
     lines.map((line, index) =>
-      index === 0
-        ? line.trimEnd()
-        : ` ${index < lines.length - 1 ? line.trim() : line.trimStart()}`
+      index === 0 ? line.trimEnd() : ` ${line.trimEnd()}`
     )
   );
 }
 
 export function printBlockComment(comment: BlockComment): Doc {
   // We remove the initial `/` to check if every line starts with `*`
   const lines = comment.value.slice(1).split('\n');
+  let trimmedLines;
+
+  // Only process lines for possible indentation if the block has multiple
+  // lines
+  if (lines.length > 1) {
+    trimmedLines = lines.map((line) => line.trimStart());
+  }
 
   return [
     '/',
-    isIndentableBlockComment(lines)
-      ? printIndentableBlockComment(lines)
+    // If the comment has multiple lines and every line starts with a star
+    // we can fix the indentation of each line.
+    trimmedLines?.every((line) => line.startsWith('*'))
+      ? printIndentableBlockComment(trimmedLines)
       : join(literalline, lines)
   ];
 }