tests: clean after SANITY tests

Some of our tests try to make sure Git behaves sensibly in a
read-only directory, by dropping 'w' permission bit before doing a
test and then restoring it after it is done.  The latter is needed
for the test framework to clean after itself without leaving a
leftover directory that cannot be removed.

Ancient parts of tests however arrange the above with

	chmod a-w . &&
	... do the test ...
	status=$?
	chmod 775 .
	(exit $status)

which obviously would not work if the test somehow dies before it
has the chance to do "chmod 775".  Rewrite them by following a more
robust pattern recently written tests use, which is

	test_when_finished "chmod 775 ." &&
	chmod a-w . &&
	... do the test ...

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/t/t0001-init.sh b/t/t0001-init.sh
index c413bff9cf..4c865051e7 100755
--- a/t/t0001-init.sh
+++ b/t/t0001-init.sh
@@ -287,6 +287,7 @@ test_expect_success 'init notices EEXIST (2)' '
 '
 
 test_expect_success POSIXPERM,SANITY 'init notices EPERM' '
+	test_when_finished "chmod +w newdir" &&
 	rm -fr newdir &&
 	mkdir newdir &&
 	chmod -w newdir &&