pluralize (I18n::Backend::Simple)

    # File lib/active_support/vendor/i18n-0.1.3/lib/i18n/backend/simple.rb, line 134
            def pluralize(locale, entry, count)
              return entry unless entry.is_a?(Hash) and count
              # raise InvalidPluralizationData.new(entry, count) unless entry.is_a?(Hash)
              key = :zero if count == 0 && entry.has_key?(:zero)
              key ||= count == 1 ? :one : :other
              raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
              entry[key]
            end