Use functions test_i18ncmp and test_i18ngrep to successfully pass tests
running under GETTEXT_POISON.
The output strings compared to in these test were marked for translation
in
ed47fdf ("i18n: unpack-trees: mark strings for translation",
2016-04-09) and later improved in
2e3926b ("i18n: unpack-trees: avoid
substituting only a verb in sentences", 2016-05-12).
Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>