[Config] Fix closure CS

Author: issei-m

src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php

@@ -161,7 +161,7 @@ public function thenEmptyArray()
      */
     public function thenInvalid($message)
     {
-        $this->thenPart = function ($v) use ($message) {throw new \InvalidArgumentException(sprintf($message, json_encode($v))); };
+        $this->thenPart = function ($v) use ($message) { throw new \InvalidArgumentException(sprintf($message, json_encode($v))); };
 
         return $this;
     }