message: docs: fix HttpClient logging's sample
diff: @@ -389,12 +389,12 @@ export class TimingInterceptor implements HttpInterceptor {
  constructor(private auth: AuthService) {}
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
  - const elapsed = Date.now();
  + const started = Date.now();
  return next
  .handle(req)
  .do(event => {
  if (event instanceof HttpResponse) {
  - const time = Date.now() - started;
  + const elapsed = Date.now() - started;
  console.log(`Request for ${req.urlWithParams} took ${elapsed} ms.`);
  }
  });
  