Moving registering extension above loading config in DI code sample

Author: richardmiller-zz

components/dependency_injection/compilation.rst

@@ -112,10 +112,11 @@ processed when the container is compiled at which point the Extensions are loade
     use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 
     $container = new ContainerBuilder();
+    $container->registerExtension(new AcmeDemoExtension);
+
     $loader = new YamlFileLoader($container, new FileLocator(__DIR__));
     $loader->load('config.yml');
 
-    $container->registerExtension(new AcmeDemoExtension);
     // ...
     $container->compile();
 
@@ -213,7 +214,7 @@ benefit of merging multiple files and validation of the configuration::
         $processor = new Processor();
         $config = $processor->processConfiguration($configuration, $configs);
 
-        $container->setParameter('acme_demo.FOO', $config['foo']);
+        $container->setParameter('acme_demo.FOO', $config['foo'])
 
         // ...
     }