Subject: bug#20253: 24.4; Document `region' face behavior changes, overlay, priority

From: Drew Adams <[email-masked]>
Date: Wed, 21 Sep 2016 13:25:43 -0700 (PDT)

Related: http://emacs.stackexchange.com/q/17324/105

(This has been reported and discussed before -
both negative values and dotted-pair values.)