The t2019-checkout-ambiguous-ref.sh tests added in v1.7.4.3~12^2
examines the output for a translatable string, and must be marked
with C_LOCALE_OUTPUT; otherwise, GETTEXT_POISON=YesPlease tests
will break.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>