MC-23058: Template strict mode is not set for unsaved template previews

Author: nathanjosiah

dev/tests/integration/testsuite/Magento/Newsletter/Controller/Adminhtml/Template/DropTest.php

@@ -30,13 +30,13 @@ public function testDefaultTemplateAction()
             'form_key' => $formKey->getFormKey(),
             'type' => Template::TYPE_HTML,
             'preview_store_id' => $storeId,
-            'text' => 'Template {{var this.template_id}}{{var this.getData(template_id)}} Text'
+            'text' => 'Template {{var this.template_id}}:{{var this.getData(template_id)}} Text'
         ];
         $this->getRequest()->setPostValue($post);
         $this->getRequest()->setMethod(HttpRequest::METHOD_POST);
         $this->dispatch('backend/newsletter/template/drop');
         $this->assertContains(
-            'Template 123 Text',
+            'Template 123: Text',
             $this->getResponse()->getBody()
         );
     }