docs: def _normalize_compare_config(self, diff):
          """Filter out strings that should not show up in the diff."""
          ignore_strings = [
              "Contextual Config Diffs",
              "No changes were found",
              "ntp clock-period",
          ]
          if self.auto_file_prompt:
              ignore_strings.append("file prompt quiet")
  
          new_list = []
          for line in diff.splitlines():
              for ignore in ignore_strings:
                  if ignore in line:
                      break
              else:  # nobreak
                  new_list.append(line)
          return "\n".join(new_list)