sample cleanup

Author: kwalrath

public/docs/_examples/dependency-injection/dart/lib/app_component.dart

@@ -23,7 +23,7 @@ import 'providers_component.dart';
       <h2>User</h2>
       <p id="user">
         {{userInfo}}
-        <button (click)=\'nextUser()\'>Next User</button>
+        <button (click)="nextUser()">Next User</button>
       <p>
       <my-heroes id="authorized" *ngIf="isAuthorized"></my-heroes>
       <my-heroes id="unauthorized" *ngIf="!isAuthorized"></my-heroes>''',
@@ -63,9 +63,7 @@ class AppComponent {
     return _userService.user;
   }
 
-  String get userInfo {
-    return 'Current user, ${user.name}, is'
+  String get userInfo => 'Current user, ${user.name}, is'
         '${isAuthorized ? "" : " not"} authorized. ';
-  }
 }
 // #enddocregion

public/docs/_examples/dependency-injection/dart/lib/car/car_no_di.dart

@@ -16,7 +16,7 @@ class Car {
   //#enddocregion car-ctor
 
   // Method using the engine and tires
-  drive() => '$description car with '
+  String drive() => '$description car with '
       '${engine.cylinders} cylinders and ${tires.make} tires.';
 }
 //#enddocregion car

public/docs/_examples/dependency-injection/dart/lib/heroes/hero_list_component.dart

@@ -9,10 +9,10 @@ import 'hero_service.dart';
     template: '''
       <div *ngFor="#hero of heroes">
         {{hero.id}} - {{hero.name}}
-        ({{hero.isSecret ? \'secret\' : \'public\'}})
+        ({{hero.isSecret ? 'secret' : 'public'}})
       </div>''')
 class HeroListComponent {
-  List<Hero> heroes;
+  final List<Hero> heroes;
 
 //#docregion ctor-signature
   HeroListComponent(HeroService heroService) : heroes = heroService.getHeroes();

public/docs/_examples/dependency-injection/dart/lib/heroes/hero_list_component_1.dart

@@ -11,5 +11,5 @@ import 'mock_heroes.dart';
         {{hero.id}} - {{hero.name}}
       </div>''')
 class HeroListComponent {
-  List<Hero> heroes = HEROES;
+  final List<Hero> heroes = HEROES;
 }

public/docs/_examples/dependency-injection/dart/lib/heroes/hero_list_component_2.dart

@@ -11,7 +11,7 @@ import 'hero_service.dart';
         {{hero.id}} - {{hero.name}}
       </div>''')
 class HeroListComponent {
-  List<Hero> heroes;
+  final List<Hero> heroes;
 
 //#docregion ctor
   HeroListComponent(HeroService heroService)

public/docs/_examples/dependency-injection/dart/lib/heroes/heroes_component.dart

@@ -8,8 +8,7 @@ import 'hero_service_provider.dart';
     selector: 'my-heroes',
     template: '''
       <h2>Heroes</h2>
-      <hero-list></hero-list>
-      ''',
+      <hero-list></hero-list>''',
     providers: const [heroServiceProvider],
     directives: const [HeroListComponent])
 class HeroesComponent {}

public/docs/_examples/dependency-injection/dart/lib/injector_component.dart

@@ -14,7 +14,7 @@ import 'logger_service.dart';
     selector: 'my-injectors',
     template: '''
       <h2>Other Injections</h2>
-      <div id="car"> {{car.drive()}}</div>
+      <div id="car">{{car.drive()}}</div>
       <div id="hero">{{hero.name}}</div>
       <div id="rodent">{{rodent}}</div>''',
     providers: const [

public/docs/_examples/dependency-injection/dart/lib/providers_component.dart

@@ -251,7 +251,7 @@ class ProviderComponent9a implements OnInit {
   // #enddocregion provider-9a-ctor
 
   ngOnInit() {
-    log = '\'app.config\' Application title is ' + _config.title;
+    log = '"app.config" Application title is ${_config.title}';
   }
 }
 

public/docs/_examples/dependency-injection/ts/app/injector.component.ts

@@ -12,7 +12,7 @@ import {Logger}               from './logger.service';
   selector: 'my-injectors',
   template: `
   <h2>Other Injections</h2>
-  <div id="car"> {{car.drive()}}</div>
+  <div id="car">{{car.drive()}}</div>
   <div id="hero">{{hero.name}}</div>
   <div id="rodent">{{rodent}}</div>
   `,