lifo/docrails — pull request #119 by c0 (2012-11-26 04:48:02+00:00)
Title: Clarification to ActiveRecord Validations Doc in 7.2 Custom Methods

In the expiration_date_cannot_be_in_the_past validation method, use `expiration_date.present?` instead of the double negative `!expiration_date.blank?`. Also join the comparisons with `&&` instead of `and`, which could cause unintended consequences.