anchor.diff:          height: kHeight,
           decoration: const BoxDecoration(
               border: const Border(
  -                bottom: const BorderSide(color: const sky.Color(0xFFF4F4F4)))),
  +                bottom: const BorderSide(color: const Color(0xFFF4F4F4)))),
           child: new Flex(children)
         )
       );
  
positive.code: // Copyright 2015 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  import 'dart:sky' as sky;
  
  import 'package:sky/rendering/box.dart';
  import 'package:sky/theme2/typography.dart' as typography;
  
negative.code: 
    final Stock stock;
  
    static const double kHeight = 79.0;
  
    UINode build() {
      String lastSale = "\$${stock.lastSale.toStringAsFixed(2)}";
  