code: function attachCommentsToFile(files, comments) {
      return files.filter(function(file) {
          return file.comments = comments.filter(function(comment) {
              if (file.filename === comment.path) {
                  return comment.reply = attachCommentReply.call(this, comment);
              }
          }.bind(this));
      }.bind(this));
  }
docs: attach review comments to the related file