test-pkt-line: introduce a packet-line test helper

diff --git a/t/t3040-subprojects-basic.sh b/t/t3040-subprojects-basic.sh
index 0a4ff6d824a0a3bf44ba8d93c2a8dffdb9c1af65..b81eb5fd6ffaf02d2a404bcbbf71e674494fd6cb 100755 (executable)
--- a/t/t3040-subprojects-basic.sh
+++ b/t/t3040-subprojects-basic.sh
@@ -19,7 +19,7 @@ test_expect_success 'setup: create subprojects' '
        git update-index --add sub1 &&
        git add sub2 &&
        git commit -q -m "subprojects added" &&
-       git diff-tree --abbrev=5 HEAD^ HEAD |cut -d" " -f-3,5- >current &&
+       GIT_PRINT_SHA1_ELLIPSIS="yes" git diff-tree --abbrev=5 HEAD^ HEAD |cut -d" " -f-3,5- >current &&
        git branch save HEAD &&
        cat >expected <<-\EOF &&
        :000000 160000 00000... A       sub1