code: public static String dequoteFull(String str, char quote)
      {
          if (str == null)
          {
              return null;
          }
  
          return dequoteFull(str, 0, str.length(), quote);
      }
docs: Removes the surrounding quote and any double quote inside the string <br>
  Example:<br>
  <pre>
  "hello""world" becomes hello"world
  </pre>
  
  @param str input string to dequote
  @param quote the quoting char
  
  @return dequoted String