Update main.ts

Author: wubingjie

src/main.ts

@@ -1,9 +1,9 @@
+// main.ts
 import 'reflect-metadata';
 import 'zone.js';
 
 import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 import {AppModule} from './app.module';
 
-
 platformBrowserDynamic().bootstrapModule(AppModule)
   .catch(err => console.error(err));