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

From: Gregory Heytings <[email-masked]>
Date: Thu, 03 Nov 2022 18:18:53 +0000

> Hmm...

Okay, this is because of:

commit 74d091a0a665da5dc01989d1b06a61ee21b975b2
Author: Lars Ingebrigtsen <[email-masked]>
Date:   Fri Sep 10 12:27:28 2021 +0200

     Change the default value of search-whitespace-regexp

     * lisp/isearch.el (search-whitespace-regexp): Change the default
     to always exclude newlines from the set (bug#21278).  It used to
     be mode-dependent whether newlines were included or not, and this
     was confusing as a user interface.

which changed the default value of search-whitespace-regexp from "\\s-+" 
to "[ \t]".