code: @Override
      public AssertionError newAssertionError(Description d, Representation representation) {
          AssertionError assertionError = getComparisonFailureInstance();
          if (assertionError != null) {
              return assertionError;
          }
  
          String message = String.format(EXPECTED_BUT_WAS_MESSAGE, getActual(), getExpected());
          return Failures.instance().failure(message);
      }
docs: {@inheritDoc}
  Create <pre>org.junit.ComparisonFailure</pre> if possible.