docs: correct typos and formatting in the Getting Started guide (#30758)

PR Close #30758

aio/content/examples/getting-started/src/app/cart/cart.component.2.html

@@ -9,7 +9,7 @@
 <!-- #docregion prices -->
 
 <div class="cart-item" *ngFor="let item of items">
-  <span>{{ item.name }} </span>
+  <span>{{ item.name }}</span>
   <span>{{ item.price | currency }}</span>
 </div>
-<!-- #enddocregion prices -->
+<!-- #enddocregion prices -->

aio/content/examples/getting-started/src/app/shipping/shipping.component.html

@@ -1,6 +1,6 @@
 <h3>Shipping Prices</h3>
 
 <div class="shipping-item" *ngFor="let shipping of shippingCosts | async">
-  <span>{{ shipping.type }} </span>
+  <span>{{ shipping.type }}</span>
   <span>{{ shipping.price | currency }}</span>
-</div>
+</div>

aio/content/examples/getting-started/src/app/shipping/shipping.component.ts

@@ -16,7 +16,9 @@ export class ShippingComponent {
 // #enddocregion props
 
 // #docregion inject-cart-service
-  constructor(private cartService: CartService) {
+  constructor(
+    private cartService: CartService
+  ) {
 // #enddocregion inject-cart-service
     this.shippingCosts = this.cartService.getShippingPrices();
 // #docregion inject-cart-service