# File lib/active_support/vendor/i18n-0.0.1/i18n.rb, line 188
    def normalize_translation_keys(locale, key, scope)
      keys = [locale] + Array(scope) + [key]
      keys = keys.map { |k| k.to_s.split(/\./) }
      keys.flatten.map { |k| k.to_sym }
    end