Fix build for page-title change

This allows the tutorial to build again, but more work is needed to
properly integrate/introduce the page-title change into the content
of the tutorial.

Author: chancancode

src/markdown/tutorial/part-1/01-orientation.md

@@ -265,7 +265,9 @@ The development server has a feature called *live reload*, which monitors your a
 As text on the welcome page pointed out, the source code for the page is located in `app/templates/application.hbs`. Let's try to edit that file and replace it with our own content:
 
 ```run:file:patch lang=handlebars cwd=super-rentals filename=app/templates/application.hbs
-@@ -1,5 +1 @@
+@@ -1,7 +1 @@
+-{{page-title "SuperRentals"}}
+-
 -{{!-- The following component displays Ember's default welcome message. --}}
 -<WelcomePage />
 -{{!-- Feel free to remove this! --}}

src/markdown/tutorial/part-1/02-building-pages.md

@@ -29,10 +29,12 @@ This time, we would like the page to be served on the `/about` URL. In order to
 The place to manage what pages are available is the *[router][TODO: link to router]*. Go ahead and open `app/router.js` and make the following change:
 
 ```run:file:patch lang=js cwd=super-rentals filename=app/router.js
-@@ -9,2 +9,3 @@
- Router.map(function() {
+@@ -8,2 +8,4 @@
+
+-Router.map(function () {});
++Router.map(function () {
 +  this.route('about');
- });
++});
 ```
 
 This adds a *[route](../../../routing/defining-your-routes/)* named "about", which is served at the `/about` URL by default.