# File lib/bundler/vendor/thor/lib/thor/actions/file_manipulation.rb, line 233
    def inject_into_module(path, module_name, *args, &block)
      config = args.last.is_a?(Hash) ? args.pop : {}
      config[:after] = /module #{module_name}\n|module #{module_name} .*\n/
      insert_into_file(path, *(args << config), &block)
    end