code: func (m *Message) StripLinkMarkup() {
  	re := regexp.MustCompile("<(.*?)>")
  	result := re.FindAllStringSubmatch(m.Text(), -1)
  	text := m.Text()
  
  	var link string
  	for _, c := range result {
  		link = c[len(c)-1]
  
  		// Done change Channel, User or Specials tags
  		if link[:2] == "#C" || link[:2] == "@U" || link[:1] == "!" {
  			continue
  		}
  
  		url := link
  		if strings.Contains(link, "|") {
  			splits := strings.Split(link, "|")
  			url = splits[1]
  		}
  
  		text = strings.Replace(text, "<"+link+">", url, -1)
  	}
  
  	m.SetText(text)
  }
docs: // StripLinkMarkup converts <http://google.com|google.com> into google.com etc.
  // https://api.slack.com/docs/message-formatting#how_to_display_formatted_messages