minor #7018 Reorder arguments: $request as the first argument (bocharsky-bw)

This PR was merged into the 2.7 branch.

Discussion
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Reorder arguments: $request as the first argument

The `Request` argument should be the first one due to it can't be optional, but other arguments can.

Commits
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31e5385 Reorder arguments: $request as the first argument

Author: wouterj

controller.rst

@@ -331,7 +331,7 @@ object. To get it in your controller, just add it as an argument and
 
     use Symfony\Component\HttpFoundation\Request;
 
-    public function indexAction($firstName, $lastName, Request $request)
+    public function indexAction(Request $request, $firstName, $lastName)
     {
         $page = $request->query->get('page', 1);