bug#41988: 28.0.50; Edebug unconditionally instruments definitions with &define specs

[Eli Zaretskii]

> From: Philipp <p.stephani2@gmail.com>
> Date: Sat, 10 Apr 2021 17:07:48 +0200
> Cc: 41988@debbugs.gnu.org
> 
> diff --git a/etc/NEWS b/etc/NEWS
> index a0f05d8cf1..9ae3740482 100644
> --- a/etc/NEWS
> +++ b/etc/NEWS
> @@ -2524,6 +2524,9 @@ back in Emacs 23.1.  The affected functions are: 
> 'make-obsolete',
>  
>  ** The 'values' variable is now obsolete.
>  
> +** The '&define' keyword in an Edebug specification now disables
> +backtracking.

Please add here a pointer to the ELisp manual where this is described,
as the text otherwise is too terse to speak for itself.

Also, the heading line should be a single complete sentence, and the
NEWS entry should be marked "+++", since the manual is being updated
by the same changeset.

(I have no opinion on the change itself, although it strikes me as
unusual to delete a feature rather than fix it.)

Thanks.