diff --git a/mrblib/enum.rb b/mrblib/enum.rb
--- a/mrblib/enum.rb
+++ b/mrblib/enum.rb
# implement a meaningful `<=>` operator, as these methods
# rely on an ordering between members of the collection.
#
-# @ISO 15.3.2
+# ISO 15.3.2
module Enumerable
NONE = Object.new