Fix static test issue 23778

Author: edenduong

app/code/Magento/SalesRule/Block/Adminhtml/Promo/Quote/Edit/Tab/Coupons/Form.php

@@ -3,12 +3,15 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\SalesRule\Block\Adminhtml\Promo\Quote\Edit\Tab\Coupons;
 
 /**
  * Coupons generation parameters form
- *
  * @author      Magento Core Team <core@magentocommerce.com>
+ *
+ * Class \Magento\SalesRule\Block\Adminhtml\Promo\Quote\Edit\Tab\Coupons\Form
  */
 class Form extends \Magento\Backend\Block\Widget\Form\Generic
 {