fix typos in 2.1

Author: Nikita Konstantinov

components/event_dispatcher/generic_event.rst

@@ -74,7 +74,7 @@ the event arguments::
 
     $event = new GenericEvent(
         $subject,
-        array('type' => 'foo', 'counter' => 0))
+        array('type' => 'foo', 'counter' => 0)
     );
     $dispatcher->dispatch('foo', $event);
 

cookbook/bundles/extension.rst

@@ -527,6 +527,7 @@ Comments and examples can be added to your configuration nodes using the
 
             return $treeBuilder;
         }
+    }
 
 This text appears as yaml comments in the output of the ``config:dump-reference``
 command.