Use new array syntax and make a few minor tweaks

Author: bocharsky-bw

page_creation.rst

@@ -86,7 +86,7 @@ to creating a page?
 #. *Create a controller*: The method below the route - ``numberAction()`` - is called
    the *controller*: this is a function where *you* build the page and ultimately
    return a ``Response`` object. You'll learn more about :doc:`controllers </controller>`
-   in their own section, including how to return JSON responses;
+   in their own section, including how to return JSON responses.
 
 The Web Debug Toolbar: Debugging Dream
 --------------------------------------
@@ -133,9 +133,9 @@ variable so we can render that::
         {
             $number = mt_rand(0, 100);
 
-            return $this->render('lucky/number.html.twig', array(
-                'number' => $number
-            ));
+            return $this->render('lucky/number.html.twig', [
+                'number' => $number,
+            ]);
         }
     }
 
@@ -184,7 +184,7 @@ So what about the other directories in the project?
 
 ``var/``
     This is where automatically-created files are stored, like cache files
-    (``var/cache/``) and logs (``var/logs/``).
+    (``var/cache/``), logs (``var/logs/``) and (``var/sessions/``).
 
 ``vendor/``
     Third-party (i.e. "vendor") libraries live here! These are downloaded via the `Composer`_
@@ -209,11 +209,11 @@ Bundles are registered in your ``app/AppKernel.php`` file (a rare PHP file in th
     {
         public function registerBundles()
         {
-            $bundles = array(
+            $bundles = [
                 new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
                 new Symfony\Bundle\TwigBundle\TwigBundle(),
                 // ...
-            );
+            ];
             // ...
 
             return $bundles;