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

From: Eli Zaretskii <[email-masked]>
Date: Wed, 18 Apr 2018 09:13:47 +0300

> From: Lars Ingebrigtsen <[email-masked]>
> Date: Tue, 17 Apr 2018 22:39:29 +0200
> Cc: [email-masked]
> 
> In any case, perhaps calling `remove-from-invisibility-spec' that's not
> in the spec anyway shouldn't alter it?  It's certainly surprising.

If the only problem is the surprising behavior, I'd prefer to document
it rather than potentially open a can of worms.