Updated the koans directory.

koans/Rakefile

@@ -7,6 +7,6 @@ require 'rake/testtask'
 task :default => :test
 
 task :test do
-  ruby '-I.', 'path_to_enlightenment.rb'
+  ruby 'path_to_enlightenment.rb'
 end
 

koans/about_message_passing.rb

@@ -89,6 +89,18 @@ class AboutMessagePassing < EdgeCase::Koan
     #
     # If the method :method_missing causes the NoMethodError, then
     # what would happen if we redefine method_missing?
+    #
+    # NOTE:
+    #
+    # In Ruby 1.8 the method_missing method is public and can be
+    # called as shown above.  However, in Ruby 1.9 the method_missing
+    # method is private.  We explicitly made it public in the testing
+    # framework so this example works in both versions of Ruby.  Just
+    # keep in mind you can't call method_missing like that in Ruby
+    # 1.9. normally.
+    #
+    # Thanks.  We now return you to your regularly schedule Ruby
+    # Koans.
   end
 
   # ------------------------------------------------------------------

koans/edgecase.rb

@@ -36,13 +36,27 @@ class Object
       self.send(method)
     end
   end
+
+  in_ruby_version("1.9") do
+    public :method_missing
+  end
 end
 
 module EdgeCase
   class Sensei
     attr_reader :failure, :failed_test
 
-    AssertionError = Test::Unit::AssertionFailedError
+    in_ruby_version("1.8") do
+      AssertionError = Test::Unit::AssertionFailedError
+    end
+
+    in_ruby_version("1.9") do
+      if defined?(MiniTest)
+        AssertionError = MiniTest::Assertion
+      else
+        AssertionError = Test::Unit::AssertionFailedError
+      end
+    end
 
     def initialize
       @pass_count = 0
@@ -165,12 +179,12 @@ module EdgeCase
         test.setup
         begin
           test.send(method)
-        rescue StandardError => ex
+        rescue StandardError, EdgeCase::Sensei::AssertionError => ex
           test.failed(ex)
         ensure
           begin
             test.teardown
-          rescue StandardError => ex
+          rescue StandardError, EdgeCase::Sensei::AssertionError => ex
             test.failed(ex) if test.passed?
           end
         end

koans/path_to_enlightenment.rb

@@ -1,5 +1,7 @@
 # The path to Ruby Enlightenment starts with the following:
 
+$LOAD_PATH << File.dirname(__FILE__)
+
 require 'about_asserts'
 require 'about_nil'
 require 'about_arrays'