* Strip tags that are added to notices
* Add test to ensure HTML is stripped by convert_notices_to_exceptions
* Test function directly, rather than through validate_cart_items
* Apply correct formatting to tests/php/StoreApi/Utilities/NoticeHandler.php
Co-authored-by: Albert Juhé Lluveras <contact@albertjuhe.com>
Co-authored-by: Albert Juhé Lluveras <contact@albertjuhe.com>