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

[Vincent Lefevre]

On 2022-11-03 18:56:41 +0100, Vincent Lefevre wrote:
> On 2022-11-03 17:49:37 +0000, Gregory Heytings wrote:
> > > I tested with "emacs -Q", and I've just tested again. I confirm the
> > > behavior I could see: a newline character is matched.  That's Debian's
> > > package emacs-gtk 1:27.1+1-3.1+b1.
> > 
> > Are you really sure?  I just tested this with that same version of Emacs
> > (Debian package emacs-gtk 1:27.1+1-3.1+b1), and
> > 
> > emacs -Q
> > ab RET bc RET ab SPC cd
> > M-<
> > C-s b SPC c
> > 
> > only matches the third line.
> 
> With this test, it only matches the third line, but not with a
> pre-existing file. Why such a difference?

Hmm... Your example is wrong!

Instead of

  ab RET bc RET ab SPC cd

it should be

  ab RET cd RET ab SPC cd

Unfortunately, this doesn't explain the problem!!!

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)