Add module nest to ruby class

add_module_nest.rb

#!/usr/bin/env ruby

module_name = "Api"
files = Dir["*.rb"]
files.each do |file|
  data = IO.read(file)
  data.gsub!("\n", "\n  ")
  new_data = "module #{module_name}\n\n  " + data + "\nend"
  IO.write(file, new_data)
end