code: func Message(commit, version string) string {
  	var c string
  	var v string
  
  	if commit == "" {
  		c = undefined
  	} else if len(commit) > 7 {
  		c = commit[:7]
  	} else {
  		c = commit
  	}
  
  	if version == "" {
  		v = undefined
  	} else {
  		v = version
  	}
  
  	return fmt.Sprintf("%s (%s)", v, c)
  }
docs: // Message returns version with format
  // `version (first seven characters of commit hash)`.