docs: def _dump_date(d, delim):
      """Used for `http_date` and `cookie_date`."""
      if d is None:
          d = gmtime()
      elif isinstance(d, datetime):
          d = d.utctimetuple()
      elif isinstance(d, (integer_types, float)):
          d = gmtime(d)
      return "%s, %02d%s%s%s%s %02d:%02d:%02d GMT" % (
          ("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun")[d.tm_wday],
          d.tm_mday,
          delim,
          (
              "Jan",
              "Feb",
              "Mar",
              "Apr",
              "May",
              "Jun",
              "Jul",
              "Aug",
              "Sep",
              "Oct",
              "Nov",
              "Dec",
          )[d.tm_mon - 1],
          delim,
          str(d.tm_year),
          d.tm_hour,
          d.tm_min,
          d.tm_sec,
      )