For akaza blog

sum1.rb

require 'akaza'

class A
  extend Akaza::Annotation

  whitespace def sum(input, output)
 	  

 	  
This	code is never evaluated.	
 	



So you can write any
sentences as comments!  
	
		    
			
	
end
end

a = A.new
input = StringIO.new("20\n22\n")
output = StringIO.new
a.sum(input, output)
p output.string # => "42"