generator test failure: undefined method 'parents'

rails/railties $ ruby -Ilib:test test/generators_test.rb
Loaded suite test/generators_test
Started
..........................E... Finished in 0.694302 seconds.

1) Error: test_rails_root_templates(GeneratorsTest):
NoMethodError: undefined method `parents' for #<TestApp::Application:0x000001021ad670>

/Users/jack/git/rails/railties/lib/rails/railtie/configurable.rb:28:in `method_missing'
/Users/jack/git/rails/railties/lib/rails/generators/named_base.rb:62:in `namespace'
/Users/jack/git/rails/railties/lib/rails/generators/named_base.rb:67:in `namespaced?'

I'm assuming that the desired method was ancestors, not parents. If so, the attached patch fixes it. Piotr is probably the best one to confirm this.