Remember you can reduce nesting if you wish,

Mod = Module.new  # equivalent to module Mod ; end

class Mod::Klass
   def one_method(param1, param2)
      puts
      puts "hello world"
      puts
   end

   def two_method
      puts "hello again"
   end
end

class Mod::NotherKlass
   def three_method
      puts "hi already"
   end
end

Speaking of OCD, I use 3-space indent because I like the non-
overlapping staircase look of the 'end's. :)