test: remote-helper: add missing and

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5801-remote-helpers.sh

@@ -160,7 +160,7 @@ test_expect_success 'push update refs' '
 	git checkout -b update master &&
 	echo update >>file &&
 	git commit -a -m update &&
-	git push origin update
+	git push origin update &&
 	git rev-parse --verify remotes/origin/update >expect &&
 	git rev-parse --verify testgit/origin/heads/update >actual &&
 	test_cmp expect actual