Left file: appwork-v1_3_1/angular-starter/src/app/app.module.ts  
Right file: appwork-v1_4_0/angular-starter/src/app/app.module.ts  

import { BrowserModule, Title } from '@angular/platform-browser';	=	import { BrowserModule, Title } from '@angular/platform-browser';
import { NgModule } from '@angular/core';		import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';		import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';		import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
// *******************************************************************************		// *******************************************************************************
// NgBootstrap		// NgBootstrap
import { NgbModule } from '@ng-bootstrap/ng-bootstrap';		import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
// *******************************************************************************		// *******************************************************************************
// App		// App
import { AppRoutingModule } from './app-routing.module';		import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';		import { AppComponent } from './app.component';
	-+	import { NotFoundComponent } from './not-found/not-found.component';
import { AppService } from './app.service';	=	import { AppService } from './app.service';
import { LayoutModule } from './layout/layout.module';		import { LayoutModule } from './layout/layout.module';
// *******************************************************************************		// *******************************************************************************
// Pages		// Pages
import { HomeComponent } from './home/home.component';		import { HomeComponent } from './home/home.component';
import { Page2Component } from './page-2/page-2.component';		import { Page2Component } from './page-2/page-2.component';
// *******************************************************************************		// *******************************************************************************
//		//
@NgModule({		@NgModule({
declarations: [		declarations: [
AppComponent,		AppComponent,
	-+	NotFoundComponent,
	=
// Pages		// Pages
HomeComponent,		HomeComponent,
Page2Component		Page2Component
],		],
imports: [		imports: [
BrowserModule,		BrowserModule,
NgbModule,		NgbModule,
// App		// App
AppRoutingModule,		AppRoutingModule,
LayoutModule		LayoutModule
],		],
providers: [		providers: [
Title,		Title,
AppService		AppService
],		],
bootstrap: [		bootstrap: [
AppComponent		AppComponent
]		]
})		})
export class AppModule {}		export class AppModule {}