Subject: bug#43412: [FEATURE] autorevert-only-if-visible [PATCH]

From: Eli Zaretskii <[email-masked]>
Date: Tue, 29 Sep 2020 17:45:48 +0300

> Date: Tue, 29 Sep 2020 09:05:20 -0400
> From: Boruch Baum <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>, [email-masked]
> 
> Slightly off-topic: The 'describe-*' output for these symbols all have
> an ambiguous statement "Probably introduced at or before Emacs version
> 27.1". What's that 'probably' all about? Shouldn't the statement be
> unequivocal, at least for recently added symbols?

The code which determines that uses some heuristics that can fail.