# File spec/gherkin/formatter/pretty_formatter_spec.rb, line 21
      def assert_pretty(input, expected_output=input)
        [true, false].each do |force_ruby|
          io = StringIO.new
          pf = Gherkin::Formatter::PrettyFormatter.new(io, true, false)
          parser = Gherkin::Parser::Parser.new(pf, true, "root", force_ruby)
          parser.parse(input, "test.feature", 0)
          output = io.string
          output.should == expected_output
        end
      end