Fix @var phpdoc

Author: fabpot

Tests/ContainerBuilderTest.php

@@ -1128,7 +1128,7 @@ public function testAddObjectResource()
 
         $this->assertCount(1, $resources);
 
-        /* @var $resource \Symfony\Component\Config\Resource\FileResource */
+        /** @var \Symfony\Component\Config\Resource\FileResource $resource */
         $resource = end($resources);
 
         $this->assertInstanceOf(FileResource::class, $resource);