anchor.diff:        .file styles.css
         .file systemjs.config.js
         .file tsconfig.json
  -:marked
  -  To see the file contents, open the <live-example></live-example>.
  -
  -  要查看文件的内容，请打开<live-example>在线例子</live-example>。
  +
  +block project-files
  +  :marked
  +    To see the file contents, open the <live-example></live-example>.
  +
  +    要查看文件的内容，请打开<live-example>在线例子</live-example>。
   
   .l-main-section
   :marked
  
positive.code: 
  .l-main-section#build-and-run
  h2 Step !{step++}: Build and run the application
  h2 步骤!{step++}： 编译并运行应用程序
  block run-app
    :marked
      Open a terminal window and enter this command:
  
negative.code: 
  .l-main-section
  h2#main Step !{step++}: Start up your application
  h2#main 步骤4：启动应用
  
  block create-main
    :marked
  