Merge branch '5.0' into 5.1

* 5.0:
  corrected argument type
  Update serializer.rst
  Replaced orphan " and" at the end of the sentence by a dot
  Add missing dot at the end of a sentence

Author: javiereguiluz

components/cache.rst

@@ -97,7 +97,7 @@ spends 5 seconds to compute data that is cached for 1 hour and this data is acce
 is fine. But after 1 hour, we get 10 new requests to a cold cache. So the data
 is computed again. The next second the same thing happens. So the data is computed
 about 50 times before the cache is warm again. This is where you need stampede
-prevention
+prevention.
 
 The first solution is to use locking: only allow one PHP process (on a per-host basis)
 to compute a specific key at a time. Locking is built-in by default, so

components/event_dispatcher.rst

@@ -328,7 +328,7 @@ Dispatch the Event
 The :method:`Symfony\\Component\\EventDispatcher\\EventDispatcher::dispatch`
 method notifies all listeners of the given event. It takes two arguments:
 the ``Event`` instance to pass to each listener of that event and the name
-of the event to dispatch and ::
+of the event to dispatch::
 
     use Acme\Store\Event\OrderPlacedEvent;
     use Acme\Store\Order;

components/serializer.rst

@@ -1212,7 +1212,7 @@ These are the options available:
     Sets the root node name (default: ``response``).
 
 ``remove_empty_tags``
-    If set to true, removes all empty tags in the generated XML.
+    If set to true, removes all empty tags in the generated XML (default: ``false``).
 
 Handling Constructor Arguments
 ------------------------------

workflow.rst

@@ -626,7 +626,7 @@ place::
             // Block the transition "publish" if it is more than 8 PM
             // with the message for end user
             $explanation = $event->getMetadata('explanation', $eventTransition);
-            $event->addTransitionBlocker(new TransitionBlocker($explanation , 0));
+            $event->addTransitionBlocker(new TransitionBlocker($explanation , '0'));
         }
 
         public static function getSubscribedEvents()