diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 0032770..b22e523 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -497,12 +497,8 @@ public function renderVar($arg) {
       return NULL;
     }
 
-    if ($arg instanceof MarkupInterface) {
-      return $arg;
-    }
-
     // Optimize for scalars as it is likely they come from the escape filter.
-    if (is_scalar($arg)) {
+    if (is_scalar($arg) || $arg instanceof MarkupInterface) {
       return $arg;
     }
 
diff --git a/core/lib/Drupal/Core/Template/TwigNodeTrans.php b/core/lib/Drupal/Core/Template/TwigNodeTrans.php
index f7d0bcd..00410af 100644
--- a/core/lib/Drupal/Core/Template/TwigNodeTrans.php
+++ b/core/lib/Drupal/Core/Template/TwigNodeTrans.php
@@ -67,8 +67,9 @@ public function compile(\Twig_Compiler $compiler) {
     // leave as an empty array.
     $compiler->raw(', array(');
     foreach ($tokens as $token) {
-      $compiler->string($token->getAttribute('placeholder'))->raw(' => $this->env->getExtension(\'drupal_core\')->renderVar(')->subcompile($token)->raw('), ');
+      $compiler->string($token->getAttribute('placeholder'))->raw(' => $this->env->getExtension("drupal_core")->renderVar(')->subcompile($token)->raw('), ');
     }
+
     $compiler->raw(')');
     // Write any options passed.
     if (!empty($options)) {