Apply suggestions from code review

Co-authored-by: Jan Góralski <jan.wojciech.goralski@gmail.com>

Author: loic425

src/Component/src/Symfony/Routing/Factory/Resource/ResourceRouteCollectionFactory.php

@@ -63,12 +63,16 @@ private function createRoutesForResource(RouteCollection $routeCollection, Resou
     private function addRouteForOperation(RouteCollection $routeCollection, ResourceMetadata $resource, HttpOperation $operation): void
     {
         $alias = $resource->getAlias();
-        Assert::notNull($alias);
+        Assert::notNull($alias, sprintf('Resource of %s has no alias.', $resource->getClass() ?? ''));
 
         $metadata = $this->resourceRegistry->get($alias);
         $routeName = $operation->getRouteName();
 
-        Assert::notNull($routeName, sprintf('Operation %s has no route name. Please define one.', $operation::class));
+        Assert::notNull($routeName, sprintf(
+            'Operation %s of %s has no route name. Please define one.',
+            $operation::class,
+            $alias,
+        ));
 
         $route = $this->createRoute($metadata, $resource, $operation);
         $routeCollection->add($routeName, $route);

src/Component/src/Symfony/Routing/Loader/ResourceLoader.php

@@ -34,9 +34,7 @@ public function __invoke(): RouteCollection
         $routeCollection = new RouteCollection();
         $resourceClasses = $this->resourceClassListFactory->create();
 
-        /**
-         * @var class-string $class
-         */
+        /** @var class-string $class */
         foreach ($resourceClasses as $class) {
             $routeCollection->addCollection($this->resourceRouteCollectionFactory->createRouteCollectionForClass($class));
         }