docs(aio): update migrated content from anguar.io

aio/content/examples/reactive-forms/src/app/app.module.ts

@@ -0,0 +1,39 @@
+// #docplaster
+// #docregion
+// #docregion v1
+import { NgModule }            from '@angular/core';
+import { BrowserModule }       from '@angular/platform-browser';
+import { ReactiveFormsModule } from '@angular/forms';  // <-- #1 import module
+
+import { AppComponent }        from './app.component';
+import { HeroDetailComponent } from './hero-detail.component'; // <-- #1 import component
+// #enddocregion v1
+import { HeroListComponent }   from './hero-list.component';
+
+import { HeroService }         from './hero.service'; //  <-- #1 import service
+// #docregion v1
+
+@NgModule({
+  imports: [
+    BrowserModule,
+    ReactiveFormsModule // <-- #2 add to Angular module imports
+  ],
+  declarations: [
+    AppComponent,
+    HeroDetailComponent, // <-- #3 declare app component
+// #enddocregion v1
+    HeroListComponent
+// #docregion v1
+  ],
+// #enddocregion v1
+  exports: [ // export for the DemoModule
+    AppComponent,
+    HeroDetailComponent,
+    HeroListComponent
+  ],
+  providers: [ HeroService ], // <-- #4 provide HeroService
+// #docregion v1
+  bootstrap: [ AppComponent ]
+})
+export class AppModule { }
+// #enddocregion v1