docs: def dump_zone_file(self):
          """Generate a zoneinfo compatible zone description table.
  
          Returns:
              list: zoneinfo descriptions
          """
          data = []
          for zone in sorted(self, key=attrgetter('country')):
              text = ['%s	%s	%s'
                      % (zone.country,
                         utils.to_iso6709(zone.latitude, zone.longitude,
                                          format='dms')[:-1],
                         zone.zone), ]
              if zone.comments:
                  text.append('	%s' % ', '.join(zone.comments))
              data.append(''.join(text))
          return data