Function formatBackgroundExitCode

tools/bash/background.go:416–418

(command string, exitCode int)

	if _, err := rand.Read(b); err != nil {
		return fmt.Sprintf("%d", time.Now().UnixNano())
	}
	return hex.EncodeToString(b)
}

func formatBackgroundExitCode(command string, exitCode int) string {
	return FormatExitCode(command, exitCode)