new cs rule: single_line_empty_body

Rule is added to the last version of php-cs-fixer

src/Bundle/ChillDocStoreBundle/Entity/DocumentCategory.php

@@ -50,8 +50,7 @@ class DocumentCategory
          * @var int The id which is unique inside the bundle
          */
         private $idInsideBundle
-    ) {
-    }
+    ) {}
 
     public function getBundleId() // ::class BundleClass (FQDN)
     {