Merge remote-tracking branch 'github-magento/MAGETWO-91501' into EPAM-PR-6

Author: nikshostko

app/code/Magento/Sales/Model/Order/Pdf/Items/Invoice/DefaultInvoice.php

@@ -128,7 +128,7 @@ public function draw()
                 ];
 
                 // Checking whether option value is not null
-                if ($option['value']!= null) {
+                if ($option['value'] !== null) {
                     if (isset($option['print_value'])) {
                         $printValue = $option['print_value'];
                     } else {

app/code/Magento/Sales/Model/Order/Pdf/Items/Shipment/DefaultShipment.php

@@ -89,7 +89,7 @@ public function draw()
                 ];
 
                 // draw options value
-                if ($option['value']!= null) {
+                if ($option['value'] !== null) {
                     $printValue = isset(
                         $option['print_value']
                     ) ? $option['print_value'] : $this->filterManager->stripTags(