# File lib/rgl/rdot.rb, line 332
332:     def to_s (leader = '', indent = '    ')
333:       hdr = leader + @dot_string + (@name.nil? ? '' : ' ' + quote_ID(@name)) + " {\n"
334: 
335:       options = @options.to_a.collect do |name, val|
336:         unless val.nil? then
337:           if name == 'label' then
338:             leader + indent + "#{quote_ID(name)} = #{quote_label(val)}"
339:           else
340:             leader + indent + "#{quote_ID(name)} = #{quote_ID(val)}"
341:           end
342:         end
343:       end.compact.join( "\n" )
344: 
345:       elements = @elements.collect do |element|
346:         element.to_s(leader + indent, indent)
347:       end.join("\n\n")
348:       hdr + (options.empty? ? '' : options + "\n\n") +
349:         (elements.empty? ? '' : elements + "\n") + leader + "}"
350:     end