Rework the files according to phpcs

app/_config.php

@@ -6,4 +6,4 @@ use SilverStripe\Security\Member;
 // remove PasswordValidator for SilverStripe 5.0
 $validator = PasswordValidator::create();
 // Settings are registered via Injector configuration - see passwords.yml in framework
-Member::set_password_validator($validator);
+Member::set_password_validator($validator);

app/src/Page.php

@@ -10,6 +10,4 @@ namespace
 
         private static $has_one = [];
     }
-}
-
-?>
+}

app/src/PageController.php

@@ -30,4 +30,4 @@ namespace {
             // See: https://docs.silverstripe.org/en/developer_guides/templates/requirements/
         }
     }
-}
+}

public/index.php

@@ -16,4 +16,4 @@ $kernel = new CoreKernel(BASE_PATH);
 $app = new HTTPApplication($kernel);
 $app->addMiddleware(new ErrorControlChainMiddleware($app));
 $response = $app->handle($request);
-$response->output();
+$response->output();