调整示例程序格式
调整示例程序格式

将程序和输出放在某个代码片段中，应该有格式的统一。

另一个方式是将程序输出放在一个单独的代码片段中，类似 https://gobyexample.com/hello-world
admpub/build-web-application-with-golang,astaxie/build-web-application-with-golang,WangKaimin/build-web-application-with-golang,astaxie/build-web-application-with-golang,faxriddin/build-web-application-with-golang,songqii/build-web-application-with-golang,faxriddin/build-web-application-with-golang,songqii/build-web-application-with-golang,admpub/build-web-application-with-golang,admpub/build-web-application-with-golang,astaxie/build-web-application-with-golang,admpub/build-web-application-with-golang,WangKaimin/build-web-application-with-golang