Two small l10n/i18n patches

(I'm not subscribed, please keep me in CC)

Hello,

I was reviewing the output of "git bisect" with my French locale
and I saw a clear mistake in the French translation (fixed
in the first commit) and I also noticed that the last message
was still in English. After review of the code, it's not a missing
translation, the problem comes down to two strings which
are not marked for translation.

So the second commit marks those strings for translation. But I haven't
checked much further than that. The final string is used in many places
in the test suite and I haven't checked if the locale is properly
hardcoded in the test suite.

In any case, "make test" is still working after those two commits.

Thank you for considering my patches. I leave it tho the regular
translators to add translations for the newly added strings.