# File lib/i18n/interpolate/ruby.rb, line 18
    def interpolate_hash(string, values)
      string.gsub(INTERPOLATION_PATTERN) do |match|
        if match == '%%'
          '%'
        else
          key = ($1 || $2).to_sym
          value = values.key?(key) ? values[key] : raise(MissingInterpolationArgument.new(values, string))
          value = value.call(values) if value.respond_to?(:call)
          $3 ? sprintf("%#{$3}", value) : value
        end
      end
    end