title: Send Jenkins notification only when new test fails
body: <p>I have Jenkins project that perform some sort of sanity check on couple of independent documents. Check result is written in JUnit XML format.</p>
  
  <p>When one document test fails, entire build fails. Jenkins can be simply configured to send email to commiter in this situation. But I want to notify commiters only when new test failed or any failed test was fixed with the commit. They are not interested in failed tests for documents they have not edited. Email should contain only information of changes in tests, not full test report. Is it possible to send this kind of notification with any currently available Jenkins plugins? What could be the simplest way to achieve this? </p>