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

[Gregory Heytings]

> Well, the issue can be reproduced only in fundamental mode.

Okay, now I see it:

emacs -Q
ab RET cd RET ab SPC cd
M-<
C-s b SPC c ;; only one match
C-x C-s foo RET
M-<
C-s b SPC c ;; two matches in Emacs 27, one match in Emacs 28

Hmm...