This is a fix for …Something in Ruby 1.8.6??… (Someone fill in here please - Aslak)

Methods
Public Instance methods
child_modules()

[ show source ]

   # File lib/spec/example/module_reopening_fix.rb, line 5
5:       def child_modules
6:         @child_modules ||= []
7:       end
include(mod)

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    # File lib/spec/example/module_reopening_fix.rb, line 13
13:       def include(mod)
14:         super
15:         child_modules.each do |child_module|
16:           child_module.__send__(:include, mod)
17:         end
18:       end
included(mod)

[ show source ]

    # File lib/spec/example/module_reopening_fix.rb, line 9
 9:       def included(mod)
10:         child_modules << mod
11:       end