code: func (css separatedString) equal(css2 separatedString) bool {
  	if len(css) != len(css2) {
  		return false
  	}
  	if !sort.StringsAreSorted(css) {
  		sort.Strings(css)
  	}
  	if !sort.StringsAreSorted(css2) {
  		sort.Strings(css2)
  	}
  	for k, s := range css {
  		if s != css2[k] {
  			return false
  		}
  	}
  	return true
  }
docs: // equal compares css with css2. Both css and css2 are sorted in place before being compared.