code: public URLNormalizer removeTrailingHash() {
          if (url.endsWith("#") && StringUtils.countMatches(url, "#") == 1) {
              url = StringUtils.removeEnd(url, "#");
          }
          return this;
      }
docs: <p>Removes trailing hash character ("#").</p>
  <code>http://www.example.com/path# &rarr;
  http://www.example.com/path</code>
  <p>
  This only removes the hash character if it is the last character.
  To remove an entire URL fragment, use {@link #removeFragment()}.
  </p>
  @return this instance
  @since 1.13.0