Introduce usagef() that takes a printf-style format

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 922a8941ed4720e2ad6dcd500a3759187aace969..531f5b795c197d942223db3cdc2d2030208e9beb 100755 (executable)
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -493,13 +493,12 @@ test_expect_success 'format-patch from a subdirectory (2)' '
 '
 
 test_expect_success 'format-patch from a subdirectory (3)' '
-       here="$TEST_DIRECTORY/$test" &&
        rm -f 0* &&
        filename=$(
                rm -rf sub &&
                mkdir -p sub/dir &&
                cd sub/dir &&
-               git format-patch -1 -o "$here"
+               git format-patch -1 -o "$TRASH_DIRECTORY"
        ) &&
        basename=$(expr "$filename" : ".*/\(.*\)") &&
        test -f "$basename"