anchor.diff:    for no reason other than to show that it can.
   
     本例子应用的`HighlightDirective`使用数据绑定的颜色或者默认颜色来设置元素的背景色。
  -  它同时设置元素的自定义属性(`customProperty`)为`true`，仅仅是显示它可以这么做，并无其它原因。
  +  它同时设置元素的`customProperty`属性为`true`，这里仅仅是为了显示它能这么做而已，并无其它原因。
   +makeExample('testing/ts/app/shared/highlight.directive.ts', '', 'app/shared/highlight.directive.ts')(format='.')
   :marked
     It's used throughout the application, perhaps most simply in the `AboutComponent`:
  
positive.code:   Here is a setup (with `import` statements) that demonstrates the improved simplicity of _shallow_ tests, relative to the stubbing setup.
  
    这些测试程序比较**浅**，因为它们只“深入”到你要测试的组件。
    这里是一套配置（拥有`import`语句），演示了相比使用stub伪造的配置来说，**浅**测试程序的简单性。
  +makeTabs('testing/ts/app/app.component.spec.ts, testing/ts/app/app.component.spec.ts', 
    'setup-schemas, setup-stubs-w-imports', 
    'app/app.component.spec.ts (NO_ERRORS_SCHEMA), app/app.component.spec.ts (Stubs)')(format='.')
  
negative.code:   An _attribute directive_ modifies the behavior of an element, component or another directive.
    Its name reflects the way the directive is applied: as an attribute on a host element.
  
    **属性指令**修改元素、组件和其它指令的行为。正如它们的名字所示，它们是作为宿主元素的属性来被使用的。
  
    The sample application's `HighlightDirective` sets the background color of an element
    based on either a data bound color or a default color (lightgray).
  