[arch-general] How do you extract version from pacman?

[Oon-Ee Ng]

Thanks to Morris and Christian (karol too, but rather not have an
additional package). Can't seem to find a reference to this specific
behaviour on the pacman manpage, unfortunately, but it'll simplify my
script.

Looks like there's no way not to have the last -4 included though, but
since that's version reference and quite important, I guess no way
around me having to sed it out. Thanks again =)