message: docs: unified console.log single string style
  PR Close
diff: @@ -30,7 +30,7 @@ export class HeroService {
  getHeroes (): Observable<Hero[]> {
  return this.http.get<Hero[]>(this.heroesUrl)
  .pipe(
  - tap(heroes => this.log(`fetched heroes`)),
  + tap(heroes => this.log('fetched heroes')),
  catchError(this.handleError('getHeroes', []))
  );
  }
  