code: def _format_episode_numbers(episodenumbers):
      
      if len(episodenumbers) == 1:
          epno = cfg.CONF.episode_single % episodenumbers[0]
      else:
          epno = cfg.CONF.episode_separator.join(
              cfg.CONF.episode_single % x for x in episodenumbers)
  
      return epno
docs: Format episode number(s) into string, using configured values.