test_expect_success 'diff -I<regex>: detect malformed regex' '
test_expect_code 129 git diff --ignore-matching-lines="^[124-9" 2>error &&
- test_i18ngrep "invalid regex given to -I: " error
+ test_grep "invalid regex given to -I: " error
'
# check_prefix <patch> <src> <dst>