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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: :extend face attribute at EOB without end-of-line char
Date: Tue, 15 Oct 2019 09:15:42 +0300
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To: Juanma Barranquero <lekktu@gmail.com>
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 (message from Juanma Barranquero on Mon, 14 Oct 2019 23:37:14 +0200)
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> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 14 Oct 2019 23:37:14 +0200
> Cc: spacibba@aol.com, Emacs developers <emacs-devel@gnu.org>
> 
> > So you are talking about a different,
> 
> Agreed.
> 
> > almost unrelated, feature.
> 
> Obviously, we don't define "almost unrelated" the same way. Fair enough.

OK, but still, we'd need a rationale.  The use case is quite obscure,
IMO, and the implementation won't be trivial (I had my share of bugs
from fiddling with display code past ZV, and you just had a taste of
that with the ticks feature).