Revert "Changed dump() to var_dump()"

This reverts commit d03c380.

book/doctrine.rst

@@ -1204,7 +1204,8 @@ to the given ``Category`` object via their ``category_id`` value.
         $category = $product->getCategory();
 
         // prints "Proxies\AppBundleEntityCategoryProxy"
-        var_dump(get_class($category));
+        dump(get_class($category));
+        die();
 
     This proxy object extends the true ``Category`` object, and looks and
     acts exactly like it. The difference is that, by using a proxy object,

book/translation.rst

@@ -12,11 +12,13 @@ wrapping each with a function capable of translating the text (or "message")
 into the language of the user::
 
     // text will *always* print out in English
-    var_dump('Hello World');
+    dump('Hello World');
+    die();
 
     // text can be translated into the end-user's language or
     // default to English
-    var_dump($translator->trans('Hello World'));
+    dump($translator->trans('Hello World'));
+    die();
 
 .. note::
 

cookbook/bundles/remove.rst

@@ -79,7 +79,8 @@ can remove the ``Acme`` directory as well.
     :method:`Symfony\\Component\\HttpKernel\\Bundle\\BundleInterface::getPath` method
     to get the path of the bundle::
 
-        var_dump($this->container->get('kernel')->getBundle('AcmeDemoBundle')->getPath());
+        dump($this->container->get('kernel')->getBundle('AcmeDemoBundle')->getPath());
+        die();
 
 3.1 Remove Bundle Assets
 ~~~~~~~~~~~~~~~~~~~~~~~~