docs: def _unicode_def_src_to_str(srclist: List[Union[str, int]]) -> str:
      """
      Used to create :data:`UNICODE_CATEGORY_STRINGS`.
  
      Args:
          srclist: list of integers or hex range strings like ``"0061-007A"``
  
      Returns:
          a string with all characters described by ``srclist``: either the
          character corresponding to the integer Unicode character number, or
          all characters corresponding to the inclusive range described
      """
      charlist = []  # type: List[str]
      for src in srclist:
          if isinstance(src, int):
              charlist.append(chr(src))
          else:
              # Range like "0041-005A"
              first, last = [int(x, 16) for x in src.split("-")]
              charlist += [chr(x) for x in range(first, last + 1)]
      return "".join(charlist)