t3301: add tests to use --format="%N"

Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3301-notes.sh

@@ -55,6 +55,15 @@ test_expect_success 'handle empty notes gracefully' '
 	git notes show ; test 1 = $?
 '
 
+test_expect_success 'show non-existent notes entry with %N' '
+	for l in A B
+	do
+		echo "$l"
+	done >expect &&
+	git show -s --format='A%n%NB' >output &&
+	test_cmp expect output
+'
+
 test_expect_success 'create notes' '
 	git config core.notesRef refs/notes/commits &&
 	MSG=b4 git notes add &&
@@ -65,6 +74,15 @@ test_expect_success 'create notes' '
 	test_must_fail git notes show HEAD^
 '
 
+test_expect_success 'show notes entry with %N' '
+	for l in A b4 B
+	do
+		echo "$l"
+	done >expect &&
+	git show -s --format='A%n%NB' >output &&
+	test_cmp expect output
+'
+
 cat >expect <<EOF
 d423f8c refs/notes/commits@{0}: notes: Notes added by 'git notes add'
 EOF