Subject: bug#50881: C-h C-s leads to empty " *Metahelp*" buffer

From: Juri Linkov <[email-masked]>
Date: Wed, 29 Sep 2021 09:54:20 +0300

> Steps to reproduce:
> 0. emacs -Q
> 1. C-h C-s f RET
>
> You are now looking at an empty " *Metahelp*" buffer.
>
> My expectation is that the help screen gets displayed before the search
> starts.

I tried to reproduce this, then typed 'C-h C-h', and it highlights
matching parens on the first line.  This not only makes no sense,
but also distracting for users seeking help.
'show-paren-mode' should be disabled in all read-only buffers.