Fix static test.

Author: nmalevanec

app/code/Magento/Quote/Model/Quote/Address/Total/Shipping.php

@@ -9,6 +9,9 @@
 use Magento\Quote\Api\Data\AddressInterface;
 use Magento\Quote\Model\Quote\Address\FreeShippingInterface;
 
+/**
+ * Collect totals for shipping.
+ */
 class Shipping extends \Magento\Quote\Model\Quote\Address\Total\AbstractTotal
 {
     /**
@@ -227,7 +230,7 @@ private function getAssignmentWeightData(AddressInterface $address, array $items
      * @param bool $addressFreeShipping
      * @param float $itemWeight
      * @param float $itemQty
-     * @param $freeShipping
+     * @param bool $freeShipping
      * @return float
      */
     private function getItemRowWeight(