Merge pull request #243 from Baltazore/fix-filenames

Add lang attribute to fix filenames

src/markdown/tutorial/part-2/11-ember-data.md

@@ -289,7 +289,7 @@ The first thing we want to do is have our builder respect a configurable default
 
 Adding the `.json` extension is a bit less common, and doesn't have a declarative configuration API of its own. We could just modify request options directly in place of use, but that would be a bit messy. Instead, let's create a handler to do this for us.
 
-```run:file:create cwd=super-rentals filename=app/utils/handlers.js
+```run:file:create lang=js cwd=super-rentals filename=app/utils/handlers.js
 export const JsonSuffixHandler = {
   request(context, next) {
     const { request } = context;
@@ -306,7 +306,7 @@ As you can see, the handler appends `.json` to the URL of each request. Pretty s
 
 The next step that we need to do, is to configure `RequestManager` to use this handler. Let's create the request-manager service.
 
-```run:file:create cwd=super-rentals filename=app/services/request-manager.js
+```run:file:create lang=js cwd=super-rentals filename=app/services/request-manager.js
 import BaseRequestManager from '@ember-data/request';
 import Fetch from '@ember-data/request/fetch';
 import { JsonSuffixHandler } from 'super-rentals/utils/handlers';