Tags: patch

Hi,

When in message-mode, hitting 'M-RET' in quoted citation and at the end
of line will add a bogus new quote on the following line like this (* is
the point position):

>>> Test*

Hit 'M-RET' will result in:

>>> Test

*

>>> 

This patch removes this quote.  I also add some tests to validate
`message-newline-and-reformat'.

In GNU Emacs 31.0.50 (build 3, x86_64-unknown-openbsd7.7, X toolkit) of
 2025-03-29 built on computer
Repository revision: eafafb4981c2616fafeedc981e209cff51b564aa
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101016
System Description: OpenBSD computer 7.7 GENERIC.MP#603 amd64

Configured using:
 'configure CC=egcc CPPFLAGS=-I/usr/local/include
 LDFLAGS=-L/usr/local/lib MAKEINFO=gmakeinfo --prefix=/home/manuel/emacs
 --bindir=/home/manuel/bin --with-x-toolkit=lucid
 --with-toolkit-scroll-bars=no --without-cairo
 --without-compress-install'