gistfile1.txt

irb(main):001:0> module I
irb(main):002:1> include
irb(main):003:1> end
=> I
irb(main):004:0> module P
irb(main):005:1> prepend
irb(main):006:1> end
=> P
irb(main):007:0> module E
irb(main):008:1> extend
irb(main):009:1> end
ArgumentError: wrong number of arguments (given 0, expected 1+)
	from (irb):8:in `extend'
	from (irb):8:in `<module:E>'
	from (irb):7
	from /Users/takkanm/.rbenv/versions/2.3.1/bin/irb:11:in `<main>'