difftool: fallback on merge.guitool

diff --git a/t/t1000-read-tree-m-3way.sh b/t/t1000-read-tree-m-3way.sh
index 3c4d2d6045bf026cf164374a41ae759d08a69bf8..013c5a7bc32849eaa1c2fe7dea007d2788e3ea8a 100755 (executable)
--- a/t/t1000-read-tree-m-3way.sh
+++ b/t/t1000-read-tree-m-3way.sh
@@ -128,7 +128,7 @@ cat >expected <<\EOF
 EOF
 
 check_result () {
-       git ls-files --stage | sed -e 's/ '"$_x40"' / X /' >current &&
+       git ls-files --stage | sed -e 's/ '"$OID_REGEX"' / X /' >current &&
        test_cmp expected current
 }