anchor.diff:        return html;
       }
       html += '<table>';
  -    $.each(sortedDiffs(diffs), function(_, diff) {
  +    $.each(sortedDiffs(diffs), (_, diff) => {
         const count = diff[propertyName];
         const td = $('<td>');
         const noneOrSome = (count == 0) ? 'none' : 'some';
  
positive.code:       }
      };
      let result = [];
      $.each(sorted, function(_, filename) {
        result.push(diffFor(filename));
      });
      return result;
  
negative.code:   // - - - - - - - - - - - - - - - - - - - - - - - -
  
    const reviewRefresh = () => {
      const reviewParams = {
              id: param.id,
          avatar: param.avatar,
         was_tag: param.wasTag,
         now_tag: param.nowTag,
        filename: param.filename
      };
      $('.ui-dialog').addClass('busy');
      $.getJSON('/differ/diff', reviewParams, (data) => {
        $('.ui-dialog').removeClass('busy');
        param = data;
        refreshDiffCheckBox();
        refreshTrafficLights();
        refreshAvatarControls();
  