anchor.diff:      let html = '';
       $.each(sortedDiffs(diffs), (_, diff) => {
         html += '<div class="diff-filename-box">';
  -      html += makeDiffDeletedCount(diff);
  -      html += makeDiffAddedCount(diff);
  +      const deletedLineCount = diff['delete_line_count'];
  +      const addedLineCount = diff['added_line_count'];
  +      const showCounts = (deletedLineCount > 0 || addedLineCount > 0);
  +      html += makeDiffDeletedCount(showCounts, diff);
  +      html += makeDiffAddedCount(showCounts, diff);
         html += makeDiffFilename(diff);
         html += '</div>';
       });
  
positive.code: 
    // - - - - - - - - - - - - - - - - - - - - - - - -
  
    const makeDiffDeletedCount = (diff) => {
      return makeDiffCount(diff, 'deleted_line_count', 'deleted');
    };
  
    const makeDiffAddedCount = (diff) => {
      return makeDiffCount(diff, 'added_line_count', 'added');
    };
  
    const makeDiffCount = (diff, propertyName, cssName) => {
      if (!inDiffMode()) {
        return '';
      }
  
negative.code:       'class': `diff-${cssName}-line-count button`,
        'data-filename': diff.filename
      });
      if (showCounts) {
        div.append(diff[propertyName]);
      }
      return outerHTML(div);
    };
  