some misc formatting cleanup

source/cookbook/working_with_objects/continuous_redrawing_of_views.md

@@ -96,26 +96,26 @@ comment was created.
 
 ```app/controllers/comment-item.js
 export default Ember.ObjectController.extend({
-    seconds: Ember.computed.oneWay('clock.pulse').readOnly()
+  seconds: Ember.computed.oneWay('clock.pulse').readOnly()
 });
 ```
 
 ```app/controllers/comments.js
 import ClockService from '../services/clock';
 
 export default Ember.ArrayController.extend({
-    itemController: 'commentItem',
-    comment: null,
-    actions: {
-      add: function () {
-        this.addObject(Em.Object.create({
-          comment: this.get('comment'),
-          clock: ClockService.create()
-        }));
-        this.set('comment', null);
-      }
+  itemController: 'commentItem',
+  comment: null,
+  actions: {
+    add: function () {
+      this.addObject(Em.Object.create({
+        comment: this.get('comment'),
+        clock: ClockService.create()
+      }));
+      this.set('comment', null);
     }
-  });
+  }
+});
 ```
 
 ### Handlebars template which displays the `pulse`