MAGETWO-90357: After Deleting Product Update shopping cart is empty

Author: StasKozar

app/code/Magento/Sales/Observer/Backend/SubtractQtyFromQuotesObserver.php

@@ -31,6 +31,6 @@ public function __construct(\Magento\Quote\Model\ResourceModel\Quote $quote)
     public function execute(\Magento\Framework\Event\Observer $observer)
     {
         $product = $observer->getEvent()->getProduct();
-        $this->_quote->substractProductFromQuotes($product);
+        $this->_quote->subtractProductFromQuotes($product);
     }
 }

app/code/Magento/Sales/Test/Unit/Observer/Backend/SubtractQtyFromQuotesObserverTest.php

@@ -48,7 +48,7 @@ public function testSubtractQtyFromQuotes()
             ['getId', 'getStatus', '__wakeup']
         );
         $this->_eventMock->expects($this->once())->method('getProduct')->will($this->returnValue($productMock));
-        $this->_quoteMock->expects($this->once())->method('substractProductFromQuotes')->with($productMock);
+        $this->_quoteMock->expects($this->once())->method('subtractProductFromQuotes')->with($productMock);
         $this->_model->execute($this->_observerMock);
     }
 }