docs(guide/controller): improve wording

Closes angular#11000

Author: rwuebker

docs/content/guide/controller.ngdoc

@@ -75,7 +75,7 @@ In order to react to events or execute computation in the view we must provide b
 scope. We add behavior to the scope by attaching methods to the `$scope` object.  These methods are
 then available to be called from the template/view.
 
-The following example uses a Controller to add a method to the scope, which doubles a number:
+The following example uses a Controller to add a method, which doubles a number, to the scope:
 
 ```js
 var myApp = angular.module('myApp',[]);