Splitting up strings in t() breaks translating

When translating persistent_login i noticed that the long strings didn't got picked up. This is because of the the use of "." to keep them within 80 letters. Example:

t('The maximum number of days for which a persistent '.
			 'login session is valid; afterwards, the user will '.
			 'need to log in again.  Enter 0 for no expiration.')

I'd suggest putting them on one line even if they are > 80 characters. I think that is what core does in most places. If we can agree on this I can prepare a patch.