[PATCH v3 1/3] t3435: use `test_config` instead of `git config`

["Samuel Čavoj" <samuel@cavoj.net>]

Replace usages of `git config` with `test_config` in t3435 to prevent
side-effects between tests.

Signed-off-by: Samuel Čavoj <samuel@cavoj.net>
---
changed v2 -> v3:
    - added this patch
---
 t/t3435-rebase-gpg-sign.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/t3435-rebase-gpg-sign.sh b/t/t3435-rebase-gpg-sign.sh
index b47c59c190..696cb6b6a4 100755
--- a/t/t3435-rebase-gpg-sign.sh
+++ b/t/t3435-rebase-gpg-sign.sh
@@ -27,7 +27,7 @@ test_rebase_gpg_sign () {
 	shift
 	test_expect_success "rebase $* with commit.gpgsign=$conf $will sign commit" "
 		git reset two &&
-		git config commit.gpgsign $conf &&
+		test_config commit.gpgsign $conf &&
 		set_fake_editor &&
 		FAKE_LINES='r 1 p 2' git rebase --force-rebase --root $* &&
 		$must_fail git verify-commit HEAD^ &&
@@ -63,7 +63,7 @@ test_rebase_gpg_sign   false -i --no-gpg-sign --gpg-sign
 
 test_expect_failure 'rebase -p --no-gpg-sign override commit.gpgsign' '
 	git reset --hard merged &&
-	git config commit.gpgsign true &&
+	test_config commit.gpgsign true &&
 	git rebase -p --no-gpg-sign --onto=one fork-point master &&
 	test_must_fail git verify-commit HEAD
 '
-- 
2.28.0