code: func (this *MarkupMarkDown) link(anchorName, linkText string) string {
  	if linkText == "" {
  		return fmt.Sprintf("[%s](#%s)", anchorName, anchorName)
  	}
  	return fmt.Sprintf("[%s](#%s)", linkText, anchorName)
  }
docs: // link renders the linkText as a link to the specified anchorName. If linktext is "", then anchorName is used as the linkText.