[Config] Removed implicit cast of ReflectionProperty to string.

src/Symfony/Component/Config/Resource/ReflectionClassResource.php

@@ -139,7 +139,7 @@ private function generateSignature(\ReflectionClass $class)
             $defaults = $class->getDefaultProperties();
 
             foreach ($class->getProperties(\ReflectionProperty::IS_PUBLIC | \ReflectionProperty::IS_PROTECTED) as $p) {
-                yield $p->getDocComment().$p;
+                yield $p->getDocComment().$p->name;
                 yield print_r(isset($defaults[$p->name]) && !\is_object($defaults[$p->name]) ? $defaults[$p->name] : null, true);
             }
         }