minor #991 Display a directory separator adapted to the OS Symfony is running on (Alsciende)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #991).

Discussion
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Display a directory separator adapted to the OS Symfony is running on

On Windows, the current Symfony installer displays

> Your application is now ready. You can start working on it at:

and a path followed by `/`, even though the path itself (returned by `realpath`) is separated by `\`. It is inelegant et potentially confusing.

This PR tries to fix that.

Commits
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8643373 Display a directory separator adapted to the OS Symfony is running on

Author: fabpot

app/Resources/views/default/index.html.twig

@@ -12,7 +12,7 @@
                     <svg id="icon-status" width="1792" height="1792" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg"><path d="M1671 566q0 40-28 68l-724 724-136 136q-28 28-68 28t-68-28l-136-136-362-362q-28-28-28-68t28-68l136-136q28-28 68-28t68 28l294 295 656-657q28-28 68-28t68 28l136 136q28 28 28 68z" fill="#759E1A"/></svg>
 
                     Your application is now ready. You can start working on it at:
-                    <code>{{ base_dir }}/</code>
+                    <code>{{ base_dir }}</code>
                 </p>
             </div>
 

src/AppBundle/Controller/DefaultController.php

@@ -15,7 +15,7 @@ public function indexAction(Request $request)
     {
         // replace this example code with whatever you need
         return $this->render('default/index.html.twig', array(
-            'base_dir' => realpath($this->container->getParameter('kernel.root_dir').'/..'),
+            'base_dir' => realpath($this->container->getParameter('kernel.root_dir').'/..').DIRECTORY_SEPARATOR,
         ));
     }
 }