commit 36603c1811451d370da4915e24eed665fe805ae4
Author: Gabriel Horner <gabriel.horner@gmail.com>
Date:   Mon Jul 4 14:44:07 2011 -0400

    Fix rake desc not being passed to thor

diff --git a/lib/thor/rake_compat.rb b/lib/thor/rake_compat.rb
index b3a8beb..c86e840 100644
--- a/lib/thor/rake_compat.rb
+++ b/lib/thor/rake_compat.rb
@@ -46,7 +46,8 @@ self.instance_eval do
       description << task.arg_names.map{ |n| n.to_s.upcase }.join(' ')
       description.strip!
 
-      klass.desc description, task.comment || non_namespaced_name
+      klass.desc description, Rake.application.last_description || non_namespaced_name
+      Rake.application.last_description = nil
       klass.send :define_method, non_namespaced_name do |*args|
         Rake::Task[task.name.to_sym].invoke(*args)
       end