code: func (ns *Namespace) HTMLUnescape(s interface{}) (string, error) {
  	ss, err := cast.ToStringE(s)
  	if err != nil {
  		return "", err
  	}
  
  	return html.UnescapeString(ss), nil
  }
docs: // HTMLUnescape returns a copy of with HTML escape requences converted to plain
  // text.