Refinements seem to no longer work like they once did.

refinement.rb

module ReverseInt
  refine Integer do  
    def reverse
      to_s.reverse.to_i
    end
  end
end

using ReverseInt

##
# In Ruby 2.0.0
24.reverse
#=> 42

##
# In Ruby 2.1.0-dev
24.reverse
#>> NoMethodError: undefined method `reverse' for 24:Fixnum

# I'm curious about the changed behavior in 2.1. Intentional?