bug#58992: 28.2; "lax space matching" no longer works

[Eli Zaretskii]

> Date: Fri, 4 Nov 2022 11:41:15 +0100
> From: Vincent Lefevre <vincent@vinc17.net>
> Cc: 58992@debbugs.gnu.org
> 
> On 2022-11-04 09:14:57 +0200, Eli Zaretskii wrote:
> > > Date: Fri, 4 Nov 2022 03:29:50 +0100
> > > From: Vincent Lefevre <vincent@vinc17.net>
> > > Cc: 58992@debbugs.gnu.org
> > > 
> > > > Because the newline's syntax is not "whitespace" in those modes.
> > > 
> > > OK, but then, the question is why the newline's syntax is not
> > > "whitespace" in those modes...
> > 
> > Because the mode sets up its syntax tables for various needs, none of
> > which is Isearch.
> 
> But the manual does not discourage the use of syntax classes
> for searching, and it is not clear from the description that
> they won't do what the user expects.

It depends on the expectations of the user.  The manual does document
which classes mean what, and the user then should decide whether it
fits the particular job.