remove whitespace

Author: raphael-geffroy

session.rst

@@ -179,7 +179,7 @@ can be anything. You'll use this key to retrieve the message.
 In the template of the next page (or even better, in your base layout template),
 read any flash messages from the session using the ``flashes()`` method provided
 by the :ref:`Twig global app variable <twig-app-variable>`.
-Alternatively, you can use the 
+Alternatively, you can use the
 :method:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface::peek`
 method instead to retrieve the message while keeping it in the bag.