I tried to update my Gem copy of Vcs with this one:
http://www.lrde.epita.fr/~pouill_n/vcs/vcs-0.5.2.3.gem
but I got:
brasilia ~/download/software/ruby/vcs % sudo gem install vcs-0.5.2.3.gem
Attempting local installation of 'vcs-0.5.2.3.gem'
ERROR: Error installing gem vcs-0.5.2.3.gem[.gem]: undefined method `include?' for nil:NilClass
:(
