Subject: bug#30171: 27.0.50; {add-to,remove-from}-invisibility-spec don't treat t specially

From: Lars Ingebrigtsen <[email-masked]>
Date: Wed, 18 Apr 2018 14:40:41 +0200

Stefan Monnier <[email-masked]> writes:

> IOW you just can't rely on the special `t` behavior: if you want your
> thing to be invisible, you need to either use the special `t` value of
> the `invisible` property (which is invisible regardless of
> buffer-invisibility-spec), or you need to add your value via
> add-to-invisibility-spec.

I see.  Makes sense.  I'll clarify this in the doc strings of those
functions, then.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no