AC-2457: Checkout Improvements

Author: nvshivakumar

app/code/Magento/Checkout/Controller/Sidebar/UpdateItemQty.php

@@ -101,7 +101,6 @@ public function execute()
      */
     protected function jsonResponse($error = '')
     {
-
         return $this->getResponse()->representJson(
             $this->jsonHelper->jsonEncode($this->sidebar->getResponseData($error))
         );

app/code/Magento/Checkout/Test/Unit/Controller/Sidebar/UpdateItemQtyTest.php

@@ -251,7 +251,7 @@ public function testExecuteWithException(): void
     /**
      * @return void
      */
-    public function testExecuteInvalidItemQty(): void
+    public function testExecuteWithInvalidItemQty(): void
     {
         $error = [
             'success' => false,