code: func reArmor(line string) string {
  	lastEq := strings.LastIndex(line, "=")
  	if lastEq == -1 {
  		return ""
  	}
  	buf := new(bytes.Buffer)
  	fmt.Fprintf(buf, "-----BEGIN PGP SIGNATURE-----\n\n")
  	payload := line[0:lastEq]
  	crc := line[lastEq:]
  	for len(payload) > 0 {
  		chunkLen := len(payload)
  		if chunkLen > 60 {
  			chunkLen = 60
  		}
  		fmt.Fprintf(buf, "%s\n", payload[0:chunkLen])
  		payload = payload[chunkLen:]
  	}
  	fmt.Fprintf(buf, "%s\n-----BEGIN PGP SIGNATURE-----\n", crc)
  	return buf.String()
  }
docs: // reArmor takes a camliSig (single line armor) and turns it back into an PGP-style
  // multi-line armored string