Understanding moneky patched implementation of Pundit from Rails 3 to 4

As part of this migration work I have been doing, I came across a monkey patched initialization of pundit. I'm understanding it for the most part but there is a part that is causing me errors:

module Pundit

  class << self
    def authorize; raise 'DoNotUseThisMethod'; end
    def authorize!; raise 'DoNotUseThisMethod'; end
  end

  included do
    if respond_to?(:rescue_from)
      rescue_from Pundit::NotAuthorizedError, with: :user_not_authorized
    end

    if respond_to?(:helper_method)
      helper_method :authorize
      helper_method :can?
    end
  end

  protected

  ... 
  # authorize, authorize! and other methods defined

Error when bring the server up:

/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.11.3/lib/active_support/concern.rb:126:in `included': Cannot define multiple 'included' blocks for a Concern (ActiveSupport::Concern::MultipleIncludedBlocks)

I tried moving this module to the concerns folder, but if I do that, the authorize methods are not called.

The Pundit module I included on the ApplicationController.

Any ideas? I know I've had this error before and I've even described it here but in this time I'm not namespacing as the other files.

I'm not sure what this monkeypatch is really supposed to accomplish. But one way of avoiding the error is by not using ActiveSupport::Concern#included. Instead just use the actual Ruby hook (Module#included) that it abstracts away:

module Pundit

  class << self
    def authorize; raise 'DoNotUseThisMethod'; end
    def authorize!; raise 'DoNotUseThisMethod'; end

    def self.included(base)
      base.class_eval do
        if respond_to?(:rescue_from)
          rescue_from Pundit::NotAuthorizedError, with: :user_not_authorized
        end

        if respond_to?(:helper_method)
          helper_method :authorize
          helper_method :can?
        end
     end
    end
  end
end