bug#42666: 27.1; function exec-path is reported as introduced in 22.1

[Eli Zaretskii]

> Date: Sun, 02 Aug 2020 17:16:31 +1000
> From: William Rankin via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> The describe-function output for function exec-path, introduced in 27.1,
> reports the function as introduced at or before Emacs version 22.1 when
> actually introduced in 27.1.
> 
> I'm not sure there's much that can be done about this since
> help-fns--first-release is finding the variable exec-path mentioned in
> an entry regarding movemail in NEWS.22.
> 
> Maybe help-fns--first-release could limit mentions instead to outline
> headings?

Or maybe it should look for "function SYMBOL" instead of just SYMBOL?