Patch to run cheat with Ruby 1.9.1

cheat_on_ruby-1.9.1.diff

--- /opt/local/lib/ruby1.9/gems/1.9.1/gems/cheat-1.2.1/lib/cheat.rb	2009-06-01 10:30:32.000000000 -0500
+++ cheat.rb	2009-06-01 10:30:19.000000000 -0500
@@ -1,5 +1,10 @@
 $:.unshift File.dirname(__FILE__)
 %w[rubygems tempfile fileutils net/http yaml open-uri wrap].each { |f| require f }
+begin
+  PLATFORM = RUBY_PLATFORM
+rescue NameError
+  # ... then we're probably using Ruby < 1.9
+end
 
 module Cheat
   extend self