Fixed a typo in configuration-block

VarunAgw · xabbuh · commit 93618ed73e12 · 2016-03-30T17:53:49.000+02:00
It is not rendered properly right now (https://symfony.com/doc/current/book/controller.html#route-parameters-as-controller-arguments) I think this should fix it
diff --git a/book/controller.rst b/book/controller.rst
@@ -260,7 +260,7 @@ to ``$name``. Just make sure they the name of the placeholder is the
 same as the name of the argument variable.
 
 Take the following more-interesting example, where the controller has two
-arguments::
+arguments:
 
 .. configuration-block::
 
