title: Nightwatch error message
body: <p>Can I change text output of failed tests in Nightwatch.js?    </p>
  
  <blockquote>
    <p>× Password Input in "Log in" Pop-up (#password) visible for 16000ms  - expected "visible" but got: "not found" </p>
  </blockquote>
  
  <p>I expect:   </p>
  
  <blockquote>
    <p>× Password Input in "Log in" Pop-up (#password) NOT FOUND for 16000ms  </p>
  </blockquote>