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

aio/content/examples/dependency-injection/src/app/app.component.2.ts

@@ -0,0 +1,25 @@
+// #docregion
+// #docregion imports
+import { Component }         from '@angular/core';
+import { Inject }   from '@angular/core';
+
+import { APP_CONFIG, AppConfig }    from './app.config';
+// #enddocregion imports
+
+@Component({
+  selector: 'my-app',
+  template: `
+    <h1>{{title}}</h1>
+    <my-car></my-car>
+    <my-heroes></my-heroes>
+  `
+})
+export class AppComponent {
+  title: string;
+
+  // #docregion ctor
+  constructor(@Inject(APP_CONFIG) config: AppConfig) {
+    this.title = config.title;
+  }
+  // #enddocregion ctor
+}