Update documentation about Symfony 3 command (#273)

* Update commands.rst (by @DRaineri)

* Make comments consistent across documentation

Author: DRaineri

Resources/doc/commands.rst

@@ -10,7 +10,11 @@ to combine the routes with the other JavaScript files in assetic.
 
 .. code-block:: bash
 
+    # Symfony 2
     $ php app/console fos:js-routing:dump
+    
+    # Symfony 3
+    $ php bin/console fos:js-routing:dump
 
 Instead of the line
 
@@ -53,6 +57,10 @@ This command lists all exposed routes:
 
 .. code-block:: bash
 
+    # Symfony 2
     $ php app/console fos:js-routing:debug [name]
+    
+    # Symfony 3
+    $ php bin/console fos:js-routing:debug [name]
 
 .. _`Configuring The Request Context Globally`: http://symfony.com/doc/current/cookbook/console/sending_emails.html#configuring-the-request-context-globally