Introduce usagef() that takes a printf-style format

diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 6ae5a2cd9511b83ad1d263c0ec0a374fc4bfc981..85eb0fbf96a65ad958422da02ca4975fe687da95 100755 (executable)
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -223,7 +223,7 @@ test_expect_success POSIXPERM 'git add (add.ignore-errors = false)' '
 '
 rm -f foo2
 
-test_expect_success '--no-ignore-errors overrides config' '
+test_expect_success POSIXPERM '--no-ignore-errors overrides config' '
        git config add.ignore-errors 1 &&
        git reset --hard &&
        date >foo1 &&