Update controller.md

Fixes #1577

docs/guide/controller.md

@@ -144,7 +144,7 @@ If action is generic enough it makes sense to implement it in a separate class t
 Create `actions/Page.php`
 
 ```php
-namespace \app\actions;
+namespace app\actions;
 
 class Page extends \yii\base\Action
 {
@@ -152,7 +152,7 @@ class Page extends \yii\base\Action
 
 	public function run()
 	{
-		$this->controller->render($view);
+		return $this->controller->render($view);
 	}
 }
 ```