anchor.diff:        filename.click(loadFrom(diff));
       });
     }; // buildDiffFilenameHandlers()
  -
  -  // - - - - - - - - - - - - - - - - - - - - - - - -
  -
  -  const radioEntrySwitch = (previous, current) => {
  -    // See app/assets/stylesheets/wide-list-item.scss
  -    if (previous !== undefined) {
  -      previous.removeClass('selected');
  -    }
  -    $('.filename', $reviewPage).removeClass('selected');
  -    current.addClass('selected');
  -  };
   
     // - - - - - - - - - - - - - - - - - - - - - - - -
   
  
positive.code:   setupButton('fork', () => cd.forkDialog(param.id, param.nowIndex));
    setForkButtonTip();
    if (!inTestPage) {
      $('#review-page').show();
      refresh();
    }
  
  
negative.code:        index: param.nowIndex
      };
      $.getJSON('/reverter/revert', checkoutParams, (data) => {
        $reviewPage.hide();
        $kataPage.show();
        deleteAllFiles();
        insertNewFiles(data.visibleFiles);
        $('#test-button').click();
  