anchor.diff:              getFilename(previousFilenameNode) === filename;
   
           $('.diff-deleted-line-count, .diff-added-line-count').attr('disabled', true);
  -        $('.diff-deleted-line-count[data-filename="'+filename+'"]').attr('disabled', false);
  -        $('.diff-added-line-count[data-filename="'+filename+'"]').attr('disabled', false);
  +        $(`.diff-deleted-line-count[data-filename="${filename}"]`).attr('disabled', false);
  +        $(`.diff-added-line-count[data-filename="${filename}"]`).attr('disabled', false);
   
           cd.radioEntrySwitch(previousFilenameNode, filenameNode);
   
  
positive.code:     const holder = $('<span>');
      $.each(diffs, (_, diff) => {
        const table = $('' +
          '<div id="' + diff.filename + '_diff_div" class="filename_div">' +
          '<table>' +
            '<tr class="valign-top">' +
              makeTd('<div class="diff-line-numbers"></div>') +
              makeTd('<div id="diff_file_content_for_' + diff.filename + '"' +
                     ' class="diff-sheet"></div>') +
            '</tr>' +
          '</table>' +
  
negative.code:                 ` data-colour='${colour}'` +
                  ` data-was-tag='${wasIndex}'` +
                  ` data-now-tag='${nowIndex}'>` +
              `<img class='with-bar-gap' src='/images/bulb_${colour}_${barGap}.png'/>` +
            '</div></td>';
          wasIndex = nowIndex;
          lastColour = event.colour;
  