[PATCH v2 3/3] config tests: fix harmless but broken "rm -r" cleanup

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

The "test_when_finished" cleanup phase added in 4179b4897f2 (config:
allow overriding of global and system configuration, 2021-04-19) has
never worked as intended, firstly the ".config/git" is a directory, so
we'd need the "-r" flag, but more importantly the $HOME variable
wasn't properly quoted.

We'd thus end up trying to remove the "trash" part of "trash
directory", which wouldn't fail with "-f", since "rm -f" won't fail on
non-existing files.

It's possible that this would have caused an actual failure if someone
had a $HOME with a space character in it, such that our "rm -f" would
fail to remove an existing directory, but in practice that probably
never happened.

Let's fix both the quoting issue, and the other issue cleanup issue in
4179b4897f2, which is that we were attempting to clean up
~/.config/git, but weren't cleaing up ~/.gitconfig.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 t/t1300-config.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/t/t1300-config.sh b/t/t1300-config.sh
index d3d9adbb3db..c6661e61af5 100755
--- a/t/t1300-config.sh
+++ b/t/t1300-config.sh
@@ -2083,12 +2083,13 @@ test_expect_success '--show-scope with --show-origin' '
 '
 
 test_expect_success 'override global and system config' '
-	test_when_finished rm -f "$HOME"/.config/git &&
-
+	test_when_finished rm -f \"\$HOME\"/.gitconfig &&
 	cat >"$HOME"/.gitconfig <<-EOF &&
 	[home]
 		config = true
 	EOF
+
+	test_when_finished rm -rf \"\$HOME\"/.config/git &&
 	mkdir -p "$HOME"/.config/git &&
 	cat >"$HOME"/.config/git/config <<-EOF &&
 	[xdg]
-- 
2.37.0.880.gf07d56b18ba