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

From: Eli Zaretskii <[email-masked]>
Date: Tue, 17 Mar 2015 09:10:18 +0200

> From: Juri Linkov <[email-masked]>
> Date: Mon, 16 Mar 2015 22:58:56 +0200
> Cc: Pål Grønås Drange
> 	<[email-masked]>, [email-masked]
> 
> A list of pairs would be much cleaner, indeed.  The problem is that
> there are 2 arguments already in region-handling commands: BEG and END.
> Using one of them for a list of pairs, and leaving another unused
> is not a nice thing to do.

Why not?  AFAIK, we already have APIs where an argument could be
either a buffer position or a string.