make StyleCI happy

src/Grant/AbstractGrant.php

@@ -277,6 +277,7 @@ abstract class AbstractGrant implements GrantTypeInterface
     protected function getRequestParameter($parameter, ServerRequestInterface $request, $default = null)
     {
         $requestParameters = (array) $request->getParsedBody();
+
         return isset($requestParameters[$parameter]) ? $requestParameters[$parameter] : $default;
     }