WC_Discounts | apply_coupon PHPDoc @throws Fix

includes/class-wc-discounts.php

@@ -239,6 +239,7 @@ class WC_Discounts {
 	 * @since  3.2.0
 	 * @param  WC_Coupon $coupon Coupon object being applied to the items.
 	 * @param  bool      $validate Set to false to skip coupon validation.
+	 * @throws Exception Error message when coupon isn't valid.
 	 * @return bool|WP_Error True if applied or WP_Error instance in failure.
 	 */
 	public function apply_coupon( $coupon, $validate = true ) {