code: func uniqueStrings(s []string) []string {
  	if len(s) < 2 {
  		return s
  	}
  
  	sort.Strings(s)
  	result := make([]string, 1, len(s))
  	result[0] = s[0]
  	for i := 1; i < len(s); i++ {
  		if s[i] != result[len(result)-1] {
  			result = append(result, s[i])
  		}
  	}
  	return result
  }
docs: // deduplicate a slice of strings