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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Highlight current line when using gud
Date: Sun, 04 Jul 2021 07:30:29 +0300
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> From: Zhiwei Chen <condy0919@gmail.com>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>,  chenzhiwei03@kuaishou.com,
>   emacs-devel@gnu.org
> Date: Sun, 04 Jul 2021 08:12:20 +0800
> 
> > I think this should be an integral part of the overlay-arrow display,
> > not an independent add-on.  IOW, I'd like to see it implemented via
> > new properties that can be put on variables which are members of
> > overlay-arrow-variable-list.
> 
> Ok, let me see how to implement it.

Thanks in advance.

> BTW, the manual[1] says overlay-arrow has nothing to do with
> overlays.

Indeed, and the manual is correct.