pacman package provider does not handle utf-8 input

Pacman package provider blows up when a utf-8 character is present in package metadata.

For example:

mbj@mbj ~ % pacman -Qi nginx
Name : nginx
Version : 1.0.11-1
URL : http://nginx.org
Licenses : custom
Groups : None
Provides : None
Depends On : pcre zlib openssl
Optional Deps : passenger
Required By : None
Conflicts With : None
Replaces : None
Installed Size : 1272.00 K
Packager : Bartłomiej Piotrowski <barthalion@gmail.com>
Architecture : x86_64
Build Date : Mon 19 Dec 2011 05:13:25 PM CET
Install Date : Tue 20 Dec 2011 08:47:05 PM CET
Install Reason : Explicitly installed
Install Script : No
Description : lightweight HTTP server and IMAP/POP3 proxy server

Chef tries to extract the metadata using an US-ASCII regexp https://github.com/opscode/chef/blob/master/chef/lib/chef/provider/package/pacman.rb#L38

This is a solution that works for me: https://github.com/opscode/chef/pull/215