message: fix(aio): fix error in import after RxJS 6 migration
  PR Close
diff: import { NgModule } from '@angular/core';
  import { BrowserModule } from '@angular/platform-browser';
  import { FormsModule } from '@angular/forms';
  -import { HttpClientModule } from '@angular//common/http';
  +import { HttpClientModule } from '@angular/common/http';
  import { AppComponent } from './app.component';
  import {
  