Minor simplification

Author: javiereguiluz

templates.rst

@@ -401,12 +401,8 @@ use the ``render()`` helper::
         {
             // ...
 
-            // pass the template path to render
-            return $this->render('product/index.html.twig');
-
-            // the second optional argument is an array of variables passed to the template
             return $this->render('product/index.html.twig', [
-                'categories' => '...',
+                'category' => '...',
                 'promotions' => ['...', '...'],
             ]);
         }
@@ -441,7 +437,7 @@ the :class:`Twig\Environment` class::
             // ...
 
             $htmlContents = $this->twig->render('product/index.html.twig', [
-                'categories' => '...',
+                'category' => '...',
                 'promotions' => ['...', '...'],
             ]);
         }