Fix different formatting of block line comments with openjdk 23+

Fixes #1153. Fixes #1161 COPYBARA_INTEGRATE_REVIEW=#1161 from dweiss:1153-block-line-comments-in-java23 e3ed83c PiperOrigin-RevId: 674304999

Author: dweiss

core/src/main/java/com/google/googlejavaformat/java/JavaCommentsHelper.java

@@ -49,7 +49,11 @@ public String rewrite(Tok tok, int maxWidth, int column0) {
  List<String> lines = new ArrayList<>();
  Iterator<String> it = Newlines.lineIterator(text);
  while (it.hasNext()) {
- lines.add(CharMatcher.whitespace().trimTrailingFrom(it.next()));
+ if (tok.isSlashSlashComment()) {
+ lines.add(CharMatcher.whitespace().trimFrom(it.next()));
+ } else {
+ lines.add(CharMatcher.whitespace().trimTrailingFrom(it.next()));
+ }
  }
  if (tok.isSlashSlashComment()) {
  return indentLineComments(lines, column0);