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

From: Eli Zaretskii <[email-masked]>
Date: Fri, 04 Nov 2022 09:21:04 +0200

> Date: Fri, 4 Nov 2022 04:30:38 +0100
> From: Vincent Lefevre <[email-masked]>
> Cc: [email-masked]
> 
> The [[:space:]\n]+ in the doc is misleading. Since a newline character
> is a whitespace, [[:space:]]+ is sufficient.

That is only true in major modes where the newline has the
"whitespace" syntax, see the description of [:space:] in the ELisp
manual.  I guess you tried this in Fundamental mode or somesuch?