anchor.diff:      }
       html += '<table>';
       $.each(sortedDiffs(diffs), (_, diff) => {
  -      if (diff == undefined) return; // TODO: FIX ME
         const count = diff[propertyName];
         const td = $('<td>');
         const noneOrSome = (count == 0) ? 'none' : 'some';
  
positive.code:     let html = '';
      html += '<table>';
      $.each(sortedDiffs(diffs), (_, diff) => {
        if (diff == undefined) return; // TODO: FIX ME
        const td = $('<td>');
        const filenameDiv =
          $('<div>', {
  
negative.code:           return diffs[i];
          }
        }
      };
      let result = [];
      $.each(sorted, (_, filename) => {
  