docs: def str_if_nested_or_str(s):
      """Turn input into a native string if possible."""
      if isinstance(s, ALL_STRING_TYPES):
          return str(s)
      if isinstance(s, (list, tuple)):
          return type(s)(map(str_if_nested_or_str, s))
      if isinstance(s, (dict, )):
          return stringify_dict_contents(s)
      return s