generate annotations in yml format. fix #568

Author: dbu

cookbook/creating_a_cms/getting-started.rst

@@ -83,7 +83,7 @@ Now you can generate the bundle in which you will write most of your code:
 
 .. code-block:: bash
 
-    $ php app/console generate:bundle --namespace=Acme/BasicCmsBundle --dir=src --no-interaction
+    $ php app/console generate:bundle --namespace=Acme/BasicCmsBundle --dir=src --format=yml --no-interaction
 
 The Documents
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