rails--rails/activesupport/lib/active_support/multibyte.rb

module ActiveSupport
  module Multibyte #:nodoc:
    DEFAULT_NORMALIZATION_FORM = :kc
    NORMALIZATIONS_FORMS = [:c, :kc, :d, :kd]
    UNICODE_VERSION = '5.0.0'
  end
end

require 'active_support/multibyte/chars'