Subject: Re: bug#20070: 24.3; have commands such as downcase-region act on a rectangle region

From: Stefan Monnier <[email-masked]>
Date: Mon, 16 Mar 2015 09:14:31 -0400

> What are BEG1, END1, BEG2, END2, etc. values here?

Buffer positions.  These are needed for the new non-contiguous notion of
region introduced by rectangles (and which could be used for other
notions of selections, e.g. the recently mentioned "inverse region").

        Stefan