[AsseticBundle] updated bundle node to match others, cleaned up validation

UPDATE.md

@@ -6,6 +6,20 @@ one. It only discusses changes that need to be done when using the "public"
 API of the framework. If you "hack" the core, you should probably follow the
 timeline closely anyway.
 
+PR11 to PR12
+------------
+
+* AsseticBundle's XML `bundle` node has been normalized to match other similar
+  nodes
+
+  Before:
+
+        <bundle name="MyBundle" />
+
+  After:
+
+        <bundle>MyBundle</bundle>
+
 PR10 to PR11
 ------------
 

src/Symfony/Bundle/AsseticBundle/DependencyInjection/AsseticExtension.php

@@ -115,12 +115,7 @@ class AsseticExtension extends Extension
     static protected function registerFormulaResources(ContainerBuilder $container, array $bundles)
     {
         $map = $container->getParameter('kernel.bundles');
-
-        if ($diff = array_diff($bundles, array_keys($map))) {
-            throw new \InvalidArgumentException(sprintf('The following bundles are not registered: "%s"', implode('", "', $diff)));
-        }
-
-        $am = $container->getDefinition('assetic.asset_manager');
+        $am  = $container->getDefinition('assetic.asset_manager');
 
         // bundle views/ directories and kernel overrides
         foreach ($bundles as $name) {

src/Symfony/Bundle/AsseticBundle/DependencyInjection/Configuration.php

@@ -66,14 +66,10 @@ class Configuration implements ConfigurationInterface
                 ->arrayNode('bundles')
                     ->defaultValue($this->bundles)
                     ->requiresAtLeastOneElement()
-                    ->beforeNormalization()
-                        ->ifTrue(function($v) { return !is_array($v); })
-                        ->then(function($v) { return array($v); })
-                    ->end()
                     ->prototype('scalar')
-                        ->beforeNormalization()
-                            ->ifTrue(function($v) { return is_array($v) && isset($v['name']); })
-                            ->then(function($v) { return $v['name']; })
+                        ->validate()
+                            ->ifNotInArray($this->bundles)
+                            ->thenInvalid('%s is not a valid bundle.')
                         ->end()
                     ->end()
                 ->end()