docs: def plateid6(self, filetype, **kwargs):
          """Print plate ID, accounting for 5-6 digit plate IDs.
  
          Parameters
          ----------
          filetype : str
              File type parameter.
          plateid : int or str
              Plate ID number.  Will be converted to int internally.
  
          Returns
          -------
          plateid6 : str
              Plate ID formatted to a string of 6 characters.
          """
          plateid = int(kwargs['plateid'])
          if plateid < 10000:
              return "{:0>6d}".format(plateid)
          else:
              return "{:d}".format(plateid)