correct reference to the CoreBundle sonata extensions in ContentBundle, added them in the BlockBundle

Author: lsmith77

bundles/block/introduction.rst

@@ -366,6 +366,16 @@ See also the :ref:`the configuration reference <reference-config-block-twig-cmf-
     block and returns an empty string for each failed block instead. The errors
     are logged at level WARNING.
 
+SonataAdminBundle Integration
+-----------------------------
+
+The BlockBundle also provides Admin classes to enable creating, editing and
+removing blocks from the admin panel. To enable the admin, use the
+``cmf_block.persistence.phpcr.use_sonata_admin`` setting. Both the
+:ref:`BlockBundle <bundles-block-types-admin_extension>` and
+:ref:`CoreBundle <bundles-core-persistence>` provide several extensions for
+SonataAdminBundle.
+
 Examples
 --------
 

bundles/content/introduction.rst

@@ -223,8 +223,8 @@ SonataAdminBundle Integration
 The ContentBundle also provides an Admin class to enable creating, editing and
 removing static content from the admin panel. To enable the admin, use the
 ``cmf_content.persistence.phpcr.use_sonata_admin`` setting. The CMF CoreBundle
-also provides an :ref:`extension <bundle-core-child-admin-extension>`
-to make it easier to link to parent documents.
+also provides :ref:`several useful extensions <bundles-core-persistence>` for
+SonataAdminBundle.
 
 .. _`with composer`: http://getcomposer.org
 .. _`symfony-cmf/content-bundle`: https://packagist.org/packages/symfony-cmf/content-bundle