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diff --git a/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php b/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php
index 2fa19f3d7..c55e40ff7 100644
--- a/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php
+++ b/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php
@@ -56,7 +56,7 @@ class Twig_NodeVisitor_Optimizer extends Twig_BaseNodeVisitor
         if (PHP_VERSION_ID < 50400 && self::OPTIMIZE_VAR_ACCESS === (self::OPTIMIZE_VAR_ACCESS & $this->optimizers) && !$env->isStrictVariables() && !$env->hasExtension('Twig_Extension_Sandbox')) {
             if ($this->inABody) {
                 if (!$node instanceof Twig_Node_Expression) {
-                    if (get_class($node) !== 'Twig_Node') {
+                    if ('Twig_Node' !== get_class($node)) {
                         array_unshift($this->prependedNodes, array());
                     }
                 } else {
@@ -88,7 +88,7 @@ class Twig_NodeVisitor_Optimizer extends Twig_BaseNodeVisitor
             if ($node instanceof Twig_Node_Body) {
                 $this->inABody = false;
             } elseif ($this->inABody) {
-                if (!$expression && get_class($node) !== 'Twig_Node' && $prependedNodes = array_shift($this->prependedNodes)) {
+                if (!$expression && 'Twig_Node' !== get_class($node) && $prependedNodes = array_shift($this->prependedNodes)) {
                     $nodes = array();
                     foreach (array_unique($prependedNodes) as $name) {
                         $nodes[] = new Twig_Node_SetTemp($name, $node->getTemplateLine());