code: public void normalizePercentEncoding() {
          try {
              uri = new URI(uri.getScheme(),
                            uri.getSchemeSpecificPart(),
                            uri.getFragment());
          } catch (URISyntaxException e) {
              // This should never be reached
              e.printStackTrace();
          }
      }
docs: Percent-Encoding Normalization
  @see "RFC3986 6.2.2.2"