Fix static test

Author: edenduong

dev/tests/integration/testsuite/Magento/CatalogInventory/Block/Adminhtml/Form/Field/CustomergroupTest.php

@@ -26,7 +26,8 @@ public function testToHtml()
         $this->_block->setId('123');
         $this->_block->setTitle('Customer Group');
         $this->_block->setInputName('groups[item_options]');
-        $expectedResult = '<select name="groups[item_options]" id="123" class="customer_group_select admin__control-select" '
+        $expectedResult = '<select name="groups[item_options]" id="123" '
+            . 'class="customer_group_select admin__control-select" '
             . 'title="Customer Group" ><option value="32000" >ALL GROUPS</option><option value="0" >NOT LOGGED IN'
             . '</option><option value="1" >General</option><option value="2" >Wholesale</option><option value="3" >'
             . 'Retailer</option></select>';