message: Fix bug in `add-co-authored-by` when no co-authors
  It would add `\n\n` every time the form was opened
diff: @@ -63,8 +63,10 @@ function addCoAuthors(): void {
  addendum.delete(getOP());
  + if (addendum.size > 0) {
  field.value += '\n\n' + [...addendum.values()].join('\n');
  }
  +}
  async function init(): Promise<void> {
  coAuthors = await fetchCoAuthoredData();
  