Apply patch

Author: theofidry

src/Symfony/Component/Serializer/Tests/Fixtures/DenormalizerDecoratorSerializer.php

@@ -21,10 +21,10 @@ public function __construct($normalizer)
         if (false === $normalizer instanceof NormalizerInterface && false === $normalizer instanceof DenormalizerInterface) {
             throw new \InvalidArgumentException();
         }
-        
+
         $this->normalizer = $normalizer;
     }
-    
+
     /**
      * {@inheritdoc}
      */