Allow to add custom price suffix at the end of price html

Append a custom suffix to the product price HTML.

add_action('wp_loaded', function() {
    if (class_exists('\Wdr\App\Router')) {
        remove_filter('woocommerce_get_price_html', array(\Wdr\App\Router::$manage_discount, 'getPriceHtml'), 100);
        add_filter('woocommerce_get_price_html', array(\Wdr\App\Router::$manage_discount, 'getPriceHtml'), 9, 2);
        remove_filter('woocommerce_get_price_html', array(\Wdr\App\Router::$manage_discount, 'getPriceHtmlSalePriceAdjustment'), 9);
        add_filter('woocommerce_get_price_html', array(\Wdr\App\Router::$manage_discount, 'getPriceHtmlSalePriceAdjustment'), 8, 2);
    }
});