90bc19b3ae ("notes.c: introduce '--separator=<paragraph-break>' option")
changed note_data.given logic such that it's no longer set if a zero
length file or blob object is provided.

Add a test for this regression by checking whether GIT_EDITOR is
invoked.

Signed-off-by: David Disseldorp <redacted>
---
 t/t3301-notes.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh
index 536bd11ff4..c0dbacc161 100755
--- a/t/t3301-notes.sh
+++ b/t/t3301-notes.sh

@@ -1557,4 +1557,9 @@ test_expect_success 'empty notes are displayed by git log' '
 	test_cmp expect actual
 '
 
+test_expect_success 'empty notes do not invoke the editor' '
+	test_commit 18th &&
+	GIT_EDITOR="false" git notes add -C "$empty_blob" --allow-empty
+'
+
 test_done

-- 
2.43.0