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

[Eli Zaretskii]

> Date: Thu, 3 Nov 2022 18:21:57 +0100
> From: Vincent Lefevre <vincent@vinc17.net>
> Cc: 58992@debbugs.gnu.org
> 
> BTW, for users who do not spend their time in reading the full doc,
> I'd suggest to clarify the doc by saying "one or more user-configurable
> whitespace characters", because AFAIK, a newline character is often
> regarded as a whitespace character, in particular by Unicode:
> 
>   https://en.wikipedia.org/wiki/Whitespace_character

Thanks, I moved the detailed description of what is considered
"whitespace" closer to the first sentence.

> So the default could be very surprising.

It's a very long-time Emacs behavior.  Too late to change the default.