Subject: bug#49631: 28.0.50; dired-hide-details-mode Probably introduced at or before Emacs version 24.4

From: Eli Zaretskii <[email-masked]>
Date: Mon, 19 Jul 2021 14:59:45 +0300

> From: Richard Stallman <[email-masked]>
> Date: Sun, 18 Jul 2021 20:08:29 -0400
> 
> 
> C-h f dired-hide-details-mode says
> 
>   Probably introduced at or before Emacs version 24.4.
> 
> Why doesn't it _know_ precisely which versiob that function was
> introduced in?  It was only a few versions ago, so this was not
> something lost in prehistory.  What causes the uncertainty?

The feature works by searching the etc/NEWS* files, and finding a
symbol there doesn't necessarily mean the Emacs release in which it's
mentioned is the actual release where the symbol was introduced.  For
example, we sometimes forget to announce features and only do that
later.  Thus the uncertainty and the cautious language.