to_s

# File lib/rdoc/dot/dot.rb, line 161
        def to_s( t = '' )

            label = @options['shape'] != 'record' && @ports.length == 0 ?
                @options['label'] ?
                    t + $tab + "label = \"#{@options['label']}\"\n" :
                    '' :
                t + $tab + 'label = "' + " \\\n" +
                t + $tab2 + "#{@options['label']}| \\\n" +
                @ports.collect{ |i|
                    t + $tab2 + i.to_s
                }.join( "| \\\n" ) + " \\\n" +
                t + $tab + '"' + "\n"

            t + "#{@name} [\n" +
            @options.to_a.collect{ |i|
                i[1] && i[0] != 'label' ?
                    t + $tab + "#{i[0]} = #{i[1]}" : nil
            }.compact.join( ",\n" ) + ( label != '' ? ",\n" : "\n" ) +
            label +
            t + "]\n"
        end