style(dart): Format with dartfmt v0.2.0

Format all pure Dart code with package:dart_style v0.2.0

Command:
```
find -type f -name "*.dart" | xargs dartformat -w
```

modules/angular2/test/di/binding_dart_spec.dart

@@ -40,7 +40,9 @@ main() {
 }
 
 class Foo {}
+
 class Bar extends Foo {}
+
 fn() => null;
 
 class Annotation {

modules/angular2/test/di/injector_dart_spec.dart

@@ -7,8 +7,10 @@ import 'package:angular2/di.dart';
 main() {
   describe('Injector', () {
     it('should support TypeLiteral', () {
-      var i = Injector.resolveAndCreate(
-          [bind(new TypeLiteral<List<int>>()).toValue([1, 2, 3]), Foo,]);
+      var i = Injector.resolveAndCreate([
+        bind(new TypeLiteral<List<int>>()).toValue([1, 2, 3]),
+        Foo,
+      ]);
       expect(i.get(Foo).value).toEqual([1, 2, 3]);
     });
   });