anchor.diff:  <script type="text/javascript"><!--
   'use strict';
   $(() => {
  -
  -  const inTestPage = () => {
  -    return $('#kata-page').length !== 0;
  -  };
   
     // - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     // After refresh() has been called param also contains
     // param.events
     //   holds the traffic-lights and is used to program
  -  //   the traffic-light [<][>] navigator buttons.
  +  //   the traffic-light [<][<][>][>] navigator buttons.
     // param.prevAvatarId
     // param.nextAvatarId
     //   hold the kata-ids and used is used to program
  
positive.code:       refreshTrafficLights();
        refreshFiles();
        refreshDiffCheckBox();
        $('img[src $= "_bar.png"]').scrollIntoView({
          direction:'horizontal',
          duration:'slow'
        });
      });
    };
  
    //-----------------------------------------
    // refresh diff? [x]
    //-----------------------------------------
  
    const inDiffMode = () => diffCheckBox().is(':checked');
  
negative.code:   };
  
    // - - - - - - - - - - - - - - - - - - - - - - - -
    // There is only one call to cd.setReviewData() and its
    // in app/views/kata/_traffic_lights.html.erb
    // The [resume] & [checkout] buttons are only on kata/edit.
    // - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  
  