docs: def _Pluralize(value, unused_context, args):
      """Formatter to pluralize words."""
      
      if len(args) == 0:
          s, p = '', 's'
      elif len(args) == 1:
          s, p = '', args[0]
      elif len(args) == 2:
          s, p = args
      else:
          # Should have been checked at compile time
          raise AssertionError
      
      if value > 1:
          return p
      else:
          return s