style(docs-infra): clean up Tour-of-Heroes examples (#36483)

I noticed these minor styling issues while aligning the `universal`
examples with the `toh-pt6` example (in a subsequent commit).

PR Close #36483

aio/content/examples/toh-pt5/src/app/hero-detail/hero-detail.component.css

@@ -19,7 +19,6 @@ button {
   padding: 5px 10px;
   border-radius: 4px;
   cursor: pointer;
-  cursor: hand;
 }
 button:hover {
   background-color: #cfd8dc;

aio/content/examples/toh-pt6/src/app/app.module.ts

@@ -1,5 +1,5 @@
 // #docplaster
-// #docregion, v1
+// #docregion , v1
 import { NgModule }       from '@angular/core';
 import { BrowserModule }  from '@angular/platform-browser';
 import { FormsModule }    from '@angular/forms';
@@ -59,6 +59,5 @@ import { MessagesComponent }    from './messages/messages.component';
 // #docregion import-httpclientmodule
 })
 // #enddocregion import-httpclientmodule
-
 export class AppModule { }
 // #enddocregion , v1

aio/content/examples/toh-pt6/src/app/hero-detail/hero-detail.component.css

@@ -18,7 +18,7 @@ button {
   border: none;
   padding: 5px 10px;
   border-radius: 4px;
-  cursor: pointer; cursor: hand;
+  cursor: pointer;
 }
 button:hover {
   background-color: #cfd8dc;

aio/content/examples/toh-pt6/src/app/hero-detail/hero-detail.component.ts

@@ -33,10 +33,10 @@ export class HeroDetailComponent implements OnInit {
     this.location.back();
   }
 
- // #docregion save
- save(): void {
+  // #docregion save
+  save(): void {
     this.heroService.updateHero(this.hero)
       .subscribe(() => this.goBack());
   }
-// #enddocregion save
+  // #enddocregion save
 }

aio/content/examples/toh-pt6/src/app/hero.service.ts

@@ -36,7 +36,7 @@ export class HeroService {
   // #docregion getHeroes, getHeroes-1
   /** GET heroes from the server */
   // #docregion getHeroes-2
-  getHeroes (): Observable<Hero[]> {
+  getHeroes(): Observable<Hero[]> {
     return this.http.get<Hero[]>(this.heroesUrl)
   // #enddocregion getHeroes-1
       .pipe(
@@ -98,7 +98,7 @@ export class HeroService {
 
   // #docregion addHero
   /** POST: add a new hero to the server */
-  addHero (hero: Hero): Observable<Hero> {
+  addHero(hero: Hero): Observable<Hero> {
     return this.http.post<Hero>(this.heroesUrl, hero, this.httpOptions).pipe(
       tap((newHero: Hero) => this.log(`added hero w/ id=${newHero.id}`)),
       catchError(this.handleError<Hero>('addHero'))
@@ -108,7 +108,7 @@ export class HeroService {
 
   // #docregion deleteHero
   /** DELETE: delete the hero from the server */
-  deleteHero (hero: Hero | number): Observable<Hero> {
+  deleteHero(hero: Hero | number): Observable<Hero> {
     const id = typeof hero === 'number' ? hero : hero.id;
     const url = `${this.heroesUrl}/${id}`;
 
@@ -121,7 +121,7 @@ export class HeroService {
 
   // #docregion updateHero
   /** PUT: update the hero on the server */
-  updateHero (hero: Hero): Observable<any> {
+  updateHero(hero: Hero): Observable<any> {
     return this.http.put(this.heroesUrl, hero, this.httpOptions).pipe(
       tap(_ => this.log(`updated hero id=${hero.id}`)),
       catchError(this.handleError<any>('updateHero'))
@@ -136,7 +136,7 @@ export class HeroService {
    * @param operation - name of the operation that failed
    * @param result - optional value to return as the observable result
    */
-  private handleError<T> (operation = 'operation', result?: T) {
+  private handleError<T>(operation = 'operation', result?: T) {
     return (error: any): Observable<T> => {
 
       // TODO: send the error to remote logging infrastructure

aio/content/examples/toh-pt6/src/app/heroes/heroes.component.css

@@ -30,7 +30,7 @@
 }
 
 .heroes a:hover {
-  color:#607D8B;
+  color: #607D8B;
 }
 
 .heroes .badge {
@@ -38,7 +38,7 @@
   font-size: small;
   color: white;
   padding: 0.8em 0.7em 0 0.7em;
-  background-color:#405061;
+  background-color: #405061;
   line-height: 1em;
   position: relative;
   left: -1px;

aio/content/examples/toh-pt6/src/app/in-memory-data.service.ts

@@ -1,7 +1,7 @@
 // #docregion , init
+import { Injectable } from '@angular/core';
 import { InMemoryDbService } from 'angular-in-memory-web-api';
 import { Hero } from './hero';
-import { Injectable } from '@angular/core';
 
 @Injectable({
   providedIn: 'root',