rails/rails — pull request #10295 by senny (2013-04-22 07:51:04+00:00)
Title: also assign nil in dirty nullable_datetime test. #10237

the origin for this change was #10237.

This is not a fix but adjusts `test_nullable_datetime_not_marked_as_changed_if_new_value_is_blank` to not only assign `""` but also `nil` as all the other `nullable_XX` tests do. We should include this for completeness sake and to prevent regressions.