Update coding standard

Author: alexander-schranz

src/Symfony/Component/HttpFoundation/StreamedJsonResponse.php

@@ -78,7 +78,7 @@ private function stream(): void
             }
 
             // generators should be used but for better DX all kind of Traversable and objects are supported
-            if (is_object($item)) {
+            if (\is_object($item)) {
                 $generators[] = $item;
                 $item = self::PLACEHOLDER;
             } elseif (self::PLACEHOLDER === $item) {

src/Symfony/Component/HttpFoundation/Tests/StreamedJsonResponseTest.php

@@ -173,7 +173,6 @@ public function testPlaceholderAsObjectStructure()
         $this->assertSame('{"object":{"__symfony_json__":"foo","bar":"__symfony_json__"},"articles":[{"title":"Article 1"},{"title":"Article 2"},{"title":"Article 3"}]}', $content);
     }
 
-
     public function testResponseHeaders()
     {
         $response = new StreamedJsonResponse([], 200, ['X-Test' => 'Test']);