code: func MustNormalizeURLString(u string, f NormalizationFlags) string {
  	result, e := NormalizeURLString(u, f)
  	if e != nil {
  		panic(e)
  	}
  	return result
  }
docs: // MustNormalizeURLString returns the normalized string, and panics if an error occurs.
  // It takes an URL string as input, as well as the normalization flags.