code: func (r RepoURL) String() string {
  	u, err := url.Parse(string(r))
  	if err != nil {
  		return string(r)
  	}
  	if u.User != nil {
  		u.User = url.User(u.User.Username())
  	}
  	return u.String()
  }
docs: // String satisfies stringer and attempts to strip off authentication
  // info from url if it exists.