anchor.diff:  multilineNormalize(lines) {
     var afterBlankLines = false; // Does [line] succeed >0 empty lines?
     var afterCommentLines = false; // Does [line] succeed >0 commentOnly lines?
  -  var newLines = new List();
  +  var newLines = [];
     for (var line in lines) {
       if (afterBlankLines && afterCommentLines) {
         // Previous line was both blank and a comment: not possible.
  
positive.code: 
    // Perform single-line normalization.
    var inDartCode = false;
    var normalizedLines = new List();
  
    for (var line in lines) {
      if (sispIsDartBegin(line)) {
  
negative.code: /// and "interesting" lines may be characterized by [analysisFunc] via
  /// the returned event object.
  findEvents(lines, analyzer) {
    var events = [];
    for (var line in lines) {
      var event = analyzer.analyze(line);
      if (event != null) events.add(event);
  