Fix YAML config bug

Holicz · web-flow · commit 876d572207db · 2018-01-05T17:26:16.000+01:00
Should be merged into all version branches
diff --git a/event_dispatcher.rst b/event_dispatcher.rst
@@ -77,7 +77,8 @@ using a special "tag":
 
         # app/config/services.yml
         services:
-            AppBundle\EventListener\ExceptionListener:
+            app.exception_listener:
+                class: AppBundle\EventListener\ExceptionListener:
                 tags:
                     - { name: kernel.event_listener, event: kernel.exception }
 
