[v10.0.x] Alerting: Fix broken integration test (#68181)

Alerting: Fix broken integration test (#68140)

From https://github.com/grafana/grafana/pull/68122

(cherry picked from commit 5422609fb1)

Co-authored-by: Matthew Jacobson <matthew.jacobson@grafana.com>

pkg/services/ngalert/notifier/email_test.go

@@ -111,11 +111,11 @@ func TestEmailNotifierIntegration(t *testing.T) {
 			expSnippets: []string{
 				"2 firing instances",
 				"<strong>severity</strong>",
-				"warning\n",
-				"critical\n",
+				"warning",
+				"critical",
 				"<strong>alertname</strong>",
-				"FiringTwo\n",
-				"FiringOne\n",
+				"FiringTwo",
+				"FiringOne",
 				"<a href=\"http://fix.me\"",
 				"<a href=\"http://localhost/base/d/abc",
 				"<a href=\"http://localhost/base/d/abc?viewPanel=5",