message: docs: fix app-hero-detaill typo
  PR Close
diff: @@ -8,7 +8,7 @@ import { HeroService } from '../hero.service';
  import { Hero } from '../hero';
  @Component({
  - selector: 'app-hero-detaill',
  + selector: 'app-hero-detail',
  templateUrl: './hero-detail.component.html',
  styleUrls: ['./hero-detail.component.css']
  })
  