docs: def format_cmd(args):
      """
      Format the arg list appropriate for display as a command line with
      individual arguments quoted appropriately.  This is intended for logging
      or display and not as input to a command interpreter (shell).
  """
      if args is None:
          return ''
      out = ''
      if not isinstance(args, list):
          args = [str(args)]
      for arg in args:
          if out != '':
              out += ' '
          out += pipes.quote(str(arg))
      return out