Fix table name on yii\rbac\DbManager::$itemChildTable

framework/yii/rbac/DbManager.php

@@ -45,7 +45,7 @@ class DbManager extends Manager
 	/**
 	 * @var string the name of the table storing authorization item hierarchy. Defaults to 'tbl_auth_item_child'.
 	 */
-	public $itemChildTable = '{{%auth_item_child}';
+	public $itemChildTable = '{{%auth_item_child}}';
 	/**
 	 * @var string the name of the table storing authorization item assignments. Defaults to 'tbl_auth_assignment'.
 	 */