docs: def _render_tab(lst):
      '''
      Takes a tab list structure and renders it to a list for applying it to
      a file
      '''
      ret = []
      for pre in lst['pre']:
          ret.append('{0}\n'.format(pre))
      for cron in lst['crons']:
          ret.append('{0} {1} {2} {3}\n'.format(cron['path'],
                                                        cron['mask'],
                                                        cron['cmd'],
                                                        TAG
                                                        )
                     )
      return ret