Fix badly formatted doc for Url::access and add tests (#898)

* Fix badly formatted doc from (#896)

* and a test

Author: dpi

stubs/Drupal/Core/Url.stub

@@ -13,7 +13,7 @@ class Url implements TrustedCallbackInterface {
     }
 
     /**
-     * @return ($return_as_object ? \Drupal\Core\Access\AccessResultInterface : bool)
+     * @return ($return_as_object is true ? \Drupal\Core\Access\AccessResultInterface : bool)
      */
     public function access(?\Drupal\Core\Session\AccountInterface $account = NULL, bool $return_as_object = FALSE): \Drupal\Core\Access\AccessResultInterface|bool {
     }

tests/src/Type/data/url.php

@@ -2,6 +2,7 @@
 
 namespace DrupalUrl;
 
+use Drupal\Core\Access\AccessResultInterface;
 use Drupal\Core\Url;
 use Symfony\Component\HttpFoundation\Request;
 use function PHPStan\Testing\assertType;
@@ -24,3 +25,6 @@
 assertType('Drupal\Core\GeneratedUrl', Url::fromUri('the_uri')->toString(TRUE));
 assertType('Drupal\Core\GeneratedUrl', Url::fromUserInput('user_input')->toString(TRUE));
 assertType('Drupal\Core\GeneratedUrl', Url::createFromRequest(new Request())->toString(TRUE));
+assertType('bool', (new Url('route_name'))->access());
+assertType(AccessResultInterface::class, (new Url())->access(return_as_object: TRUE));
+assertType('bool', (new Url())->access(return_as_object: FALSE));