Here's the output:
% ruby -r RMagick -e'puts Magick::Long_version'
This is RMagick 1.9.3 ($Date: 2005/10/13 23:01:29 $) Copyright (C) 2005
by Timothy P. Hunter
Built with ImageMagick 6.1.9 01/20/05 Q16 http://www.imagemagick.org
Built for ruby 1.8.2 (2004-12-25) [i686-linux]
Web page: http://rmagick.rubyforge.org
Email: rmagick / rubyforge.org

Clayton