docs(guide): fix dropped word in controller description

docs/content/guide/di.ngdoc

@@ -283,13 +283,12 @@ someModule.controller('MyController', ['$scope', 'dep1', 'dep2', function($scope
 This avoids the creation of global functions for controllers and also protects against minification.
 
 Controllers are special in that, unlike services, there can be many instances of them in the
-application. For example, there would be one instance of a for every instance of the `ng-controller`
-directive in the template.
+application. For example, there would be one instance for every `ng-controller` directive in the template.
 
 Moreover, additional dependencies are made available to Controllers:
 
 * {@link scope `$scope`}: Controllers are always associated with a point in the DOM and so are provided with
   access to the {@link scope scope} at that point. Other components, such as servies only have access to the
   singleton {@link $rootScope} service.
 * {@link $route} resolves: If a controller is instantiated as part of a route, then any values that
-  are resolved as part of the route are made available for injection into the controller.
+  are resolved as part of the route are made available for injection into the controller.