[Python-3000] Four new failing tests

["Martin v. Löwis"]

> Wasn't unicodedata.ascii_letters suggested at one point (to eliminate
> the string module), or was that my imagination?

Not sure - I don't recall such a proposal.

> IMO, if there is a need for unicode or locale letters, we should
> provide a function to generate them as needed.  It can be passed
> directly to set or whatever datastructure is actually needed.  We
> shouldn't burden the startup cost with such a large datastructure
> unless absolutely necessary (nor should we use a property to load it
> when first needed; expensive to compute attribute and all that).

Exactly my feelings. Still, people seem to like string.letters a lot,
and I'm unsure as to why that is.

Regards,
Martin