anchor.diff:        'class': `diff-${cssName}-line-count button`,
         'data-filename': diff.filename
       });
  -    const count = diff[propertyName];
  -    if (count !== 0) {
  -      div.append(count);
  +    if (showCounts) {
  +      div.append(diff[propertyName]);
       }
       return outerHTML(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:     let html = '';
      $.each(sortedDiffs(diffs), (_, diff) => {
        html += '<div class="diff-filename-box">';
        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>';
      });
  