t7006: modernize calls to unset

diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index cdb70b4b3356eeb45bb6e5ac62d1f82eb6b3ccdc..6872ba1a42ce289c0983b1ed62f05defb493bf49 100755 (executable)
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@@ -35,7 +35,7 @@ test_expect_success 'setup' '
                tr 1234 "\370\235\204\236")" a1 &&
 
        echo 5 >a1 &&
-       git commit --quiet -m "a                                                                12      34      56      78" a1
+       git commit --quiet -m "a                                                                12      34      56      78" a1 &&
 
        echo 6 >a1 &&
        git commit --quiet -m "Commit by someone else" \