code: private void compareCharacterData(CharacterData control, CharacterData test,
                                        DifferenceListener listener, Difference difference)
          throws DifferenceFoundException {
          compare(control.getData(), test.getData(), control, test, listener,
                  difference);
      }
docs: Character comparison method used by comments, text and CDATA sections
  @param control
  @param test
  @param listener
  @param difference
  @throws DifferenceFoundException