fix parameterization of test error message

Author: bparees

test/e2e/storage/volume_metrics.go

@@ -117,7 +117,7 @@ var _ = utils.SIGDescribe("[Serial] Volume metrics", func() {
 		framework.ExpectNoError(err)
 
 		err = e2epod.WaitForPodRunningInNamespace(c, pod)
-		framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(c, pod), "Error starting pod ", pod.Name)
+		framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(c, pod), "Error starting pod %s", pod.Name)
 
 		e2elog.Logf("Deleting pod %q/%q", pod.Namespace, pod.Name)
 		framework.ExpectNoError(framework.DeletePodWithWait(f, c, pod))