bug#58210: 29.0.50; Visual line mode movement bug

[Jacky Li]

If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
line above, resulting in a unwanted behaviour. This behaviour was not
observed in the build of Sept 24 HEAD, but in the build of Sept 30
HEAD. I suspect that the bug commit is within this period.

Also, this bug only happens when visual-line-mode is enabled. The
related interactive functions are (beginning-of-visual-line),
(end-of-visual-line), (kill-visual-line).


In GNU Emacs 29.0.50 (build 11, x86_64-pc-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.17.6) of 2022-10-01 built on artix
Repository revision: 2ceb09315c0d590d6f50ff8649066f260e35e7fb
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Artix Linux

Configured using:
 'configure --with-native-compilation --with-imagemagick --with-x
 --with-x-toolkit=gtk3 --with-xwidgets --with-xinput2 --with-mailutils'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3
THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM XWIDGETS
GTK3 ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=exwm-xim
  locale-coding-system: utf-8-unix

Major mode: Shell

Minor modes in effect:
  electric-pair-mode: t
  display-time-mode: t
  exwm-firefox-mode: t
  pixel-scroll-precision-mode: t
  sly-symbol-completion-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  emms-playing-time-display-mode: t
  emms-playing-time-mode: t
  mood-line-mode: t
  global-tree-sitter-mode: t
  corfu-history-mode: t
  global-corfu-mode: t
  corfu-mode: t
  global-auto-revert-mode: t
  which-key-mode: t
  marginalia-mode: t
  savehist-mode: t
  vertico-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  shell-switcher-mode: t
  shell-dirtrack-mode: t
  org-roam-db-autosync-mode: t
  pdf-occur-global-minor-mode: t
  comint-fontify-input-mode: t
  straight-use-package-mode: t
  straight-package-neutering-mode: t
  windmove-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  column-number-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/jacky/.config/emacs/straight/build/jsonrpc/jsonrpc hides 
/usr/local/share/emacs/29.0.50/lisp/jsonrpc
/home/jacky/.config/emacs/straight/build/transient/transient hides 
/usr/local/share/emacs/29.0.50/lisp/transient
/home/jacky/.config/emacs/straight/build/project/project hides 
/usr/local/share/emacs/29.0.50/lisp/progmodes/project
/home/jacky/.config/emacs/straight/build/xref/xref hides 
/usr/local/share/emacs/29.0.50/lisp/progmodes/xref
/home/jacky/.config/emacs/straight/build/flymake/flymake hides 
/usr/local/share/emacs/29.0.50/lisp/progmodes/flymake
/home/jacky/.config/emacs/straight/build/eldoc/eldoc hides 
/usr/local/share/emacs/29.0.50/lisp/emacs-lisp/eldoc
/home/jacky/.config/emacs/straight/build/let-alist/let-alist hides 
/usr/local/share/emacs/29.0.50/lisp/emacs-lisp/let-alist

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web-mode web-mode-autoloads init-nginx nginx-mode nginx-mode-autoloads
init-rust cargo cargo-process cargo-autoloads toml-mode conf-mode align
toml-mode-autoloads rustic-spellcheck rustic-expand rustic-lsp
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Memory information:
((conses 16 1120380 209601)
 (symbols 48 74083 33)
 (strings 32 311115 31125)
 (string-bytes 1 10548084)
 (vectors 16 188440)
 (vector-slots 8 3807652 266108)
 (floats 8 825 844)
 (intervals 56 4418 2728)
 (buffers 1000 52))