method name is 'index' not 'indexAction'

The route definitions here reference a method `indexAction` on the `LeapYearController` but the method is defined as `index`

Author: dcsmith926

create_framework/http_kernel_controller_resolver.rst

@@ -24,7 +24,7 @@ Update the route definition accordingly::
 
     $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
         'year' => null,
-        '_controller' => array(new LeapYearController(), 'indexAction'),
+        '_controller' => array(new LeapYearController(), 'index'),
     )));
 
 The move is pretty straightforward and makes a lot of sense as soon as you
@@ -64,7 +64,7 @@ two colons and a method name as a valid callback, like 'class::method'::
 
     $routes->add('leap_year', new Routing\Route('/is_leap_year/{year}', array(
         'year' => null,
-        '_controller' => 'LeapYearController::indexAction',
+        '_controller' => 'LeapYearController::index',
     )));
 
 To make this code work, modify the framework code to use the controller