code: func (me MultiErr) Error() string {
  	ret := make([]string, len(me.errors)+1)
  	ret[0] = "Multiple error:"
  	for ndx, err := range me.errors {
  		ret[ndx+1] = fmt.Sprintf("\t%d: %s", ndx, err.Error())
  	}
  	return strings.Join(ret, "\n")
  }
docs: // Error returns the error string for MultiErr