The translations were all random fuzzy strings, which can only do harm, so
remove them.
Moreover, given the status of revset (it seems mostly an internal undocumented module, and
to understand it you need the source anyway), I prefer not to translate it for
now.
Significant updates were performed - when translating something, I tried to
choose a term and use it consistently everywhere possible, so here I translated
a lot of messages. Additionally, I use the mq extension a lot, and now I am
using the translation, so I will be able to translate it better.
Since [OPTION]... is intended to mean more options, it was translated in Italian
as plural. However the plural is conveyed by `...', so switch to the singular.
This was also useful because for the '-o OPT' extdiff option, I have to
translate `OPT' as a singular.
The problem was introduced already in revision 8d217f7d68be by the original
Italian translator, according to logs. This might be due to a bug in the program
he used, "Lokalize 0.3", or maybe not - some accented characters exist also in
that commit.
I started updating many fuzzy messages which no longer expressed the
intended meaning - new translations are inserted only to keep
coherence.
Not all fuzzy messages have been fixed, yet.
