diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index d8df7d7..7442761 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2326,7 +2326,7 @@ function drupal_common_theme() {
     ),
     // From menu.inc.
     'menu' => array(
-      'variables' => array('items' => array(), 'attributes' => []),
+      'variables' => array('items' => array(), 'attributes' => array()),
       'template' => 'menu',
     ),
     'menu_local_task' => array(
diff --git a/core/modules/system/src/Tests/Theme/EngineTwigTest.php b/core/modules/system/src/Tests/Theme/EngineTwigTest.php
index a179379..a98bb3c 100644
--- a/core/modules/system/src/Tests/Theme/EngineTwigTest.php
+++ b/core/modules/system/src/Tests/Theme/EngineTwigTest.php
@@ -76,8 +76,7 @@ public function testTwigLinkGenerator() {
       'link via the linkgenerator: ' . $link_generator->generateFromUrl('register', new Url('user.register')),
     ];
 
-    $content = $this->drupalGetContent();
-    debug($content);
+    $content = $this->getRawContent();
     $this->assertFalse(empty($content), 'Page content is not empty');
     foreach ($expected as $string) {
       $this->assertRaw('<div>' . $string . '</div>');
diff --git a/core/modules/system/templates/menu.html.twig b/core/modules/system/templates/menu.html.twig
index 392263b..4f6daed 100644
--- a/core/modules/system/templates/menu.html.twig
+++ b/core/modules/system/templates/menu.html.twig
@@ -16,10 +16,11 @@
  */
 #}
 {% import _self as menus %}
-{# @TODO Add a nav element around.#}
+{# @TODO Add a nav element around. #}
 
-{#We call a macro which calls itself to render the full tree.
-@see http://twig.sensiolabs.org/doc/tags/macro.html
+{#
+  We call a macro which calls itself to render the full tree.
+  @see http://twig.sensiolabs.org/doc/tags/macro.html
 #}
 {{ menus.menu_links(items, attributes, 0) }}
 
diff --git a/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php b/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
index 528f7aa..9441a50 100644
--- a/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
+++ b/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
@@ -6,6 +6,7 @@
  */
 
 namespace Drupal\twig_theme_test;
+
 use Drupal\Core\Url;
 
 /**
@@ -44,7 +45,7 @@ public function urlGeneratorRender() {
   public function linkGeneratorRender() {
     return array(
       '#theme' => 'twig_theme_test_link_generator',
-      '#test_url' => new Url('user.register')
+      '#test_url' => new Url('user.register'),
     );
   }