code: func VersionString() string {
  	version := ""
  	version += fmt.Sprintf("Version:        %s\n", VERSION)
  	version += fmt.Sprintf("Git hash:       %s\n", REVISION)
  	version += fmt.Sprintf("Built:          %s\n", BUILTAT)
  	version += fmt.Sprintf("Golang version: %s\n", runtime.Version())
  	version += fmt.Sprintf("OS/Arch:        %s/%s\n", runtime.GOOS, runtime.GOARCH)
  	return version
  }
docs: // VersionString show version thing