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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: vc-region-history: HG?
Date: Tue, 16 Jan 2018 19:15:44 +0200
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In-reply-to: <873735lvz9.fsf@mat.ucm.es> (message from Uwe Brauer on Tue, 16
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> From: Uwe Brauer <oub@mat.ucm.es>
> Date: Tue, 16 Jan 2018 15:27:38 +0100
> 
> I just found out about vc-region-history which looks very 
> interesting.
> 
> However it does not seem to support mercurial, but it does support 
> git.
> 
> What are the technical hurdles to include mercurial?

Someone needs to write the vc-hg.el backend for this command.