Replaced orphan " and" at the end of the sentence by a dot

Author: Levure

components/event_dispatcher.rst

@@ -336,7 +336,7 @@ 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;