Added 'app.ts' test file to doc-shredder tests

tools/doc-shredder/_test/test_source/no-multiregion/app.ts

@@ -0,0 +1,22 @@
+// #docregion
+// #docregion import
+import {Component, View, bootstrap} from 'angular2/angular2';
+// #enddocregion
+
+// #docregion class-w-annotations
+@Component({
+  selector: 'my-app'
+})
+@View({
+  template: '<h1 id="output">My First Angular 2 App</h1>'
+})
+// #docregion class
+class AppComponent {
+}
+// #enddocregion
+// #enddocregion
+
+// #docregion bootstrap
+bootstrap(AppComponent);
+// #enddocregion
+// #enddocregion