anchor.diff:    // - - - - - - - - - - - - - - - - - - - - - - - -
     const nextEventIndex = (n) => {
       if (param.nowIndex === param.events.length-1) {
  -      return null; // disable
  +      return null; // Disable
       } else {
         return n;
       }
  
positive.code: 
    // - - - - - - - - - - - - - - - - - - - - - - - -
    const sortedDiffs = (diffs) => {
      // ensure filenames appear in the same order as kata/edit page
      const filenames = diffs.map(diff => diffFilename(diff));
      const sorted = cd.sortedFilenames(filenames);
      const diffFor = (filename) => diffs.find(diff => diffFilename(diff) === filename);
  
negative.code:   const resetFilenameAddedDeletedLineCountHandlers = () => {
  
      const display = (node, name, value) => {
        // Only [+][-] counts for current filename are live
        if ($(node).html() === '&nbsp;') { return; }
        if ($(node).attr('disabled') !== 'disabled') {
          const filename = $(node).data('filename');
  