Bug#108416: Format of short description should be mandated
Currently, most package start the short package description with a
capital letter, but some don't. Also, some short descriptions end
with a period, some don't. I think, policy state, what is correct.
(I would prefer capital letter and period, but that's just a personal
preference.) Of course, policy shouldn't be too strict about that
as there may be cases where for example a capital letter doesn't
sense (e.g. aRts is a name that should be spelled just like that,
also please respect non-english package description translations).