Revert "Merge pull request #7668 from Draiken/fix_issue_6497"

This reverts commit f4ad0ebe7a, reversing
changes made to 8b2cbb3a83.

Conflicts:
	actionpack/CHANGELOG.md

REASON: This added introduced a bug when you have a shorthand route
inside a nested namespace.

See
281367eb77

actionpack/CHANGELOG.md

@@ -139,16 +139,6 @@
 
     *Tima Maslyuchenko*
 
-*   Fixed a bug with shorthand routes scoped with the `:module` option not
-    adding the module to the controller as described in issue #6497.
-    This should now work properly:
-
-        scope :module => "engine" do
-          get "api/version" # routes to engine/api#version
-        end
-
-    *Luiz Felipe Garcia Pereira*
-
 *   Sprockets integration has been extracted from Action Pack to the `sprockets-rails`
     gem. `rails` gem is depending on `sprockets-rails` by default.
 

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -182,7 +182,7 @@ module ActionDispatch
               controller ||= default_controller
               action     ||= default_action
 
-              unless controller.is_a?(Regexp)
+              unless controller.is_a?(Regexp) || to_shorthand
                 controller = [@scope[:module], controller].compact.join("/").presence
               end
 

actionpack/test/dispatch/routing_test.rb

@@ -363,7 +363,6 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
         resources :errors, :shallow => true do
           resources :notices
         end
-        get 'api/version'
       end
 
       scope :path => 'api' do
@@ -1301,12 +1300,6 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
     assert_equal 'account#shorthand', @response.body
   end
 
-  def test_match_shorthand_with_module
-    assert_equal '/api/version', api_version_path
-    get '/api/version'
-    assert_equal 'api/api#version', @response.body
-  end
-
   def test_dynamically_generated_helpers_on_collection_do_not_clobber_resources_url_helper
     assert_equal '/replies', replies_path
   end