code: func SignalGoString(s *os.Signal) string {
  	if s == nil {
  		return "(*os.Signal)(nil)"
  	}
  	if *s == nil {
  		return "<nil>"
  	}
  	return fmt.Sprintf("%q", *s)
  }
docs: // SignalGoString returns the value of the os.Signal for printing in a string.