[PATCH v2 2/9] cherry-pick: add test for `--skip` advice in `git commit`

[Phillip Wood <phillip.wood123@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

In dcb500dc16c (cherry-pick/revert: advise using --skip, 2019-07-02),
`git commit` learned to suggest to run `git cherry-pick --skip` when
trying to cherry-pick an empty patch, but that was never tested for.

Here is a test that verifies that a message is given to the user that
contains the correct invocation.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 t/t3510-cherry-pick-sequence.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 793bcc7fe3..5b94fdaa67 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -123,7 +123,8 @@ test_expect_success 'revert --skip to skip commit' '
 test_expect_success 'skip "empty" commit' '
 	pristine_detach picked &&
 	test_commit dummy foo d &&
-	test_must_fail git cherry-pick anotherpick &&
+	test_must_fail git cherry-pick anotherpick 2>err &&
+	test_i18ngrep "git cherry-pick --skip" err &&
 	git cherry-pick --skip &&
 	test_cmp_rev dummy HEAD
 '
-- 
2.24.0