[Mailman-i18n] sorting pygettext.py output

[Martin von Loewis]

> If that looks good, I'll check it in.

That is indeed what sorting should do, IMO.

While sorting and normalization certainly helps when a new version of
the catalog comes along, there is actually tool for merging an old
localized catalog with the new POT file, in the form of GNU msgmerge.
I don't know whether you are all aware of it, so I thought I'd mention
it.

Is anybody interested in having a pure-python version of msgmerge, or
is using GNU msgmerge good enough?

Regards,
Martin