test_expect_success 'setup' '
mkdir .git/hooks &&
- (echo "#!/bin/sh" ; echo "exit 1") >.git/hooks/update &&
- chmod +x .git/hooks/update &&
+ write_script .git/hooks/update <<-\EOF &&
+ exit 1
+ EOF
echo 1 >file &&
git add file &&
git commit -m 1 &&