optimizer3.rb:262:in `delete_lesser_equivalent_node': Interrupt
	from optimizer3.rb:259:in `call'
	from optimizer3.rb:247:in `delete_if'
	from optimizer3.rb:246:in `delete_if'
	from ./sorted_array.rb:19:in `delete_if'
	from optimizer3.rb:246:in `delete_if'
	from optimizer3.rb:259:in `delete_lesser_equivalent_node'
	from optimizer3.rb:542:in `add_open_node'
	from optimizer3.rb:614:in `open_tag'
	from optimizer3.rb:775:in `markup'
	from optimizer3.rb:438:in `markup_start'
	from optimizer3.rb:841:in `run'
	from optimizer3.rb:933