code: func (mrt MarkdownRichText) URL(text string, url string) string {
  	repalcer := strings.NewReplacer("[", "⟦", "]", "⟧", "(", "❨", ")", "❩")
  	text = fmt.Sprintf("[%s](%s)", repalcer.Replace(text), url)
  	return text
  }
docs: // URL generates [text](URL)