bug#30001: 27.0.50; Outdated info on save-excursion in (info "(cl) Modify Macros")

[Eli Zaretskii]

> From: Xu Chunyang <mail@xuchunyang.me>
> Date: Sat, 06 Jan 2018 13:29:57 +0800
> 
> 'C-h S cl-letf' or (info "(cl) Modify Macros") has the following:
> 
>   Note that `cl-letf' on `(point)' is not quite like a
>   `save-excursion', as the latter effectively saves a marker which
>   tracks insertions and deletions in the buffer.
> 
> but 'save-excursion' is no longer saving marker since Emacs 25.1
> according to 'C-h f save-excursion'.

save-excursion doesn't save the _mark_, but it still saves a _marker_
that tracks point, as opposed to just the value of point at the moment
of the call.

Do you have a practical use case where the documentation is incorrect?

Thanks.