message: docs(aio): unified console.log single string style
  PR Close
diff: @@ -40,7 +40,7 @@ export class HeroService {
  // #enddocregion getHeroes-1
  .pipe(
  // #enddocregion getHeroes-2
  - tap(heroes => this.log(`fetched heroes`)),
  + tap(heroes => this.log('fetched heroes')),
  // #docregion getHeroes-2
  catchError(this.handleError('getHeroes', []))
  );
  