rails/rails — pull request #9744 by tkhr (2013-03-16 11:13:58+00:00)
Title: add test for `new` method's abstract error

test for
https://github.com/rails/rails/blob/ad624345e54bd20802de67b2b5c9ef29ecf5
d5f4/activerecord/lib/active_record/inheritance.rb#L18