t1300: remove global config settings injected by test-lib.sh

Since test-lib.sh now writes `safe.bareRepository=all` to the global
config when `WITH_BREAKING_CHANGES` is in effect, that entry shows
up in `git config --list` output. Tests in t1300 that expect exact
config contents then fail because of this unexpected extra line.

Unlike the working-tree contamination fixed in the preceding
commits, this is not about the file's existence but about its
content leaking into test expectations. Since t1300 does not use
bare repositories, simply remove the injected setting in a
preparatory step.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Assisted-by: Claude Opus 4.6
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t1300-config.sh b/t/t1300-config.sh
index 128971ee12fa6c510c4110d9b958037fbf578f42..11fc976f3ab2717f8cf3814c42d8a3b2687d495d 100755 (executable)
--- a/t/t1300-config.sh
+++ b/t/t1300-config.sh
@@ -11,6 +11,13 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-terminal.sh
 
+# test-lib.sh may have added global config (e.g. safe.bareRepository)
+# that would appear in "git config --list" output and break tests
+# that expect exact config contents.
+test_expect_success 'remove global config from test-lib.sh' '
+       test_might_fail git config --global --unset-all safe.bareRepository
+'
+
 for mode in legacy subcommands
 do