get_sha1_oneline: make callers prepare the commit list to traverse

diff --git a/t/t6009-rev-list-parent.sh b/t/t6009-rev-list-parent.sh
index c8a96a9a994badde602c8bf7a7decda048a00525..52f7b277ceae3ae183bc6082c01af9f76bd39a86 100755 (executable)
--- a/t/t6009-rev-list-parent.sh
+++ b/t/t6009-rev-list-parent.sh
@@ -18,7 +18,7 @@ test_expect_success setup '
 
        commit one &&
 
-       test_tick=$(($test_tick - 2400))
+       test_tick=$(($test_tick - 2400)) &&
 
        commit two &&
        commit three &&