updated koans with latest src

koans/README.rdoc

@@ -36,6 +36,8 @@ Windows from the command prompt (cmd.exe)
    c:\ruby --version
    c:\rake --version
 
+If you don't have rake installed, just run `gem install rake`
+
 Any response for Ruby with a version number greater than 1.8 is fine (should be
 around 1.8.6 or more). Any version of rake will do.
 
@@ -130,7 +132,15 @@ Brian Marick's fantastic guide for beginners Everyday Scripting with Ruby    ::
 
 = Other stuff
 
-Author         ::   Jim Weirich <jim@weirichhouse.org>
-Author         ::   Joe O'Brien <joe@edgecase.com>
+Author         :: Jim Weirich <jim@weirichhouse.org>
+Author         :: Joe O'Brien <joe@edgecase.com>
 Issue Tracker  :: http://www.pivotaltracker.com/projects/48111
 Requires       :: Ruby 1.8.x or later and Rake (any recent version)
+
+= License
+
+http://i.creativecommons.org/l/by-nc-sa/3.0/88x31.png
+
+RubyKoans is released under a Creative Commons,
+Attribution-NonCommercial-ShareAlike, Version 3.0
+(http://creativecommons.org/licenses/by-nc-sa/3.0/) License.

koans/about_iteration.rb

@@ -1,18 +1,32 @@
 require File.expand_path(File.dirname(__FILE__) + '/edgecase')
 
 class AboutIteration < EdgeCase::Koan
+
+  # -- An Aside ------------------------------------------------------
+  # Ruby 1.8 stores names as strings. Ruby 1.9 stores names as
+  # symbols. So we use a version dependent method "as_name" to convert
+  # to the right format in the koans.  We will use "as_name" whenever
+  # comparing to lists of methods.
+
   in_ruby_version("1.8") do
-    def test_each_is_a_method_on_arrays
-      assert_equal __, [].methods.include?("each")
+    def as_name(name)
+      name.to_s
     end
   end
 
   in_ruby_version("1.9") do
-    def test_each_is_a_method_on_arrays
-      assert_equal __, [].methods.include?(:each)
+    def as_name(name)
+      name.to_sym
     end
   end
 
+  # Ok, now back to the Koans.
+  # -------------------------------------------------------------------
+
+  def test_each_is_a_method_on_arrays
+    assert_equal __, [].methods.include?(as_name(:each))
+  end
+
   def test_iterating_with_each
     array = [1, 2, 3]
     sum = 0
@@ -72,7 +86,7 @@ class AboutIteration < EdgeCase::Koan
     result = [2, 3, 4].inject(0) { |sum, item| sum + item }
     assert_equal __, result
 
-    result2 = [2, 3, 4].inject(1) { |product, item| product * item }
+    result2 = [2, 3, 4].inject(1) { |sum, item| sum * item }
     assert_equal __, result2
 
     # Extra Credit: