prow/plugins/dog/dog.go
func FormatURL(dogURL string) (string, error) {
	if dogURL == "" {
		return "", errors.New("empty url")
	}
	src, err := url.ParseRequestURI(dogURL)
	if err != nil {
		return "", fmt.Errorf("invalid url %s: %v", dogURL, err)
	}
	return fmt.Sprintf("[![dog image](%s)](%s)", src, src), nil
}
func FormatURL(dogURL string) (string, error) {
	if dogURL == "" {
		return "", errors.New("empty url")
	}
	src, err := url.ParseRequestURI(dogURL)
	if err != nil {
		return "", fmt.Errorf("invalid url %s: %v", dogURL, err)
	}
	return fmt.Sprintf("[![dog image](%s)](%s)", src, src), nil
}
// FormatURL will return the GH markdown to show the image for a specific dogURL.