The new option is called 'insist', it allows pressing the same key as
the register name to exit minibuffer.  This would ease adoption of the
new preview by users not wanting to press RET.

Examples:

To insert register "a", you can do C-x r i a a
To overwrite register "z", you can do C-x r x z z

See attached patch.

Thanks.




In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.16.0, Xaw3d scroll bars) of 2024-01-20 built on IPad-S340
Repository revision: d3fe2de10e17d5a2c619728dbcb52feb326ccb36
Repository branch: fix_bug#67882
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Linux Mint 21.3

Configured using:
 'configure --bindir=/usr/local/sbin/emacs-30.0.50 --with-cairo
 --with-x-toolkit=lucid --with-modules --without-tree-sitter
 --without-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XAW3D XDBE XIM XINPUT2 XPM LUCID ZLIB

Important settings:
  value of $LANG: fr_FR.UTF-8
  locale-coding-system: utf-8-unix

Major mode: 

Minor modes in effect:
  emms-mode-line-mode: t
  emms-playing-time-display-mode: t
  emms-playing-time-mode: t
  server-mode: t
  psession-mode: t
  psession-savehist-mode: t
  global-git-gutter-mode: t
  display-time-mode: t
  winner-mode: t
  tv-save-place-mode: t
  helm-epa-mode: t
  helm-descbinds-mode: t
  helm-top-poll-mode: t
  helm-adaptive-mode: t
  helm-mode: t
  helm-minibuffer-history-mode: t
  helm-ff-icon-mode: t
  helm-popup-tip-mode: t
  async-bytecomp-package-mode: t
  dired-async-mode: t
  minibuffer-depth-indicate-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  minibuffer-regexp-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow epa-mail face-remap mail-extr emacsbug addressbook-bookmark
tv-mu4e-config config-w3m mu4e-contrib mu4e-patch mu4e mu4e-org
mu4e-notification notifications mu4e-main smtpmail mu4e-view
mu4e-mime-parts gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls
dig gnus-sum gnus-group gnus-undo gnus-start gnus-dbus gnus-cloud nnimap
nnmail mail-source utf7 nnoo gnus-spec gnus-int gnus-range gnus-win gnus
mu4e-headers mu4e-thread mu4e-actions mu4e-compose nnheader range
mu4e-search mu4e-lists mu4e-bookmarks mu4e-mark mu4e-message shr
pixel-fill kinsoku url-file svg dom flow-fill hl-line mu4e-contacts
mu4e-update mu4e-folders mu4e-context mu4e-query-items mu4e-server
mu4e-modeline mu4e-vars mu4e-helpers mu4e-config mu4e-window ido message
sendmail yank-media puny rfc822 mml mml-sec gnus-util mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util
ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils mailheader
mu4e-obsolete smerge-mode diff whitespace char-fold image-file
image-converter emms-config emms-mpris emms-librefm-stream
emms-librefm-scrobbler emms-playlist-limit emms-i18n emms-history
emms-score emms-stream-info emms-metaplaylist-mode emms-bookmarks
emms-cue emms-mode-line-icon emms-browser sort emms-volume
emms-volume-sndioctl emms-volume-mixerctl emms-volume-pulse
emms-volume-amixer emms-playlist-sort emms-last-played emms-player-xine
emms-player-mpd tq emms-lyrics emms-url emms-streams emms-show-all
emms-tag-editor emms-tag-tracktag emms-mark emms-mode-line emms-cache
emms-info-native emms-info-native-spc emms-info-native-mp3
emms-info-native-ogg emms-info-native-opus emms-info-native-flac
emms-info-native-vorbis bindat emms-info-exiftool emms-info-tinytag
emms-info-metaflac emms-info-opusinfo emms-info-ogginfo
emms-info-mp3info emms-playlist-mode emms-player-vlc emms-player-mpv
emms-playing-time emms-info emms-later-do emms-player-mplayer
emms-player-simple emms-source-playlist emms-source-file locate
emms-setup emms emms-compat emms-auto helm-external tramp-sh
helm-bookmark helm-net bookmark cl-extra tramp-archive tramp-gvfs
tramp-cache time-stamp zeroconf dbus xml helm-command helm-elisp
helm-eval edebug debug backtrace helm-info helm-ls-git vc-git diff-mode
vc vc-dispatcher make-mode flymake-shellcheck cus-start flymake project
warnings sh-script smie treesit executable conf-mode ledger-mode
ledger-check ledger-texi ledger-test ledger-sort ledger-report
ledger-reconcile ledger-occur ledger-fonts ledger-fontify ledger-state
ledger-complete ledger-schedule ledger-init ledger-xact ledger-post
ledger-exec ledger-navigate eshell esh-cmd generator esh-ext esh-opt
esh-proc esh-io esh-arg esh-module esh-groups esh-util ledger-context
ledger-commodities org-config ob-gnuplot org-crypt org-protocol org ob
ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-src ob-comint
org-pcomplete org-list org-footnote org-faces org-entities org-version
ob-emacs-lisp ob-core ob-eval org-cycle org-table ol org-fold
org-fold-core org-keys oc org-loaddefs find-func org-compat org-macs
ledger-regex bug-reference thingatpt texinfo texinfo-loaddefs
emacs-news-mode noutline outline naquadah-theme solar cal-dst holidays
holiday-loaddefs appt diary-lib diary-loaddefs cal-menu calendar
cal-loaddefs server imenu psession frameset pcase git-gutter mule-util
dired-extension time winner describe-variable help-fns radix-tree
tv-utils tv-save-place.el advice init-helm epa derived epg rfc6068
epg-config helm-epa helm-descbinds cus-edit pp icons wid-edit helm-sys
popup helm-adaptive helm-mode helm-misc helm-files image-dired
image-dired-tags image-dired-external image-dired-util image-mode exif
filenotify tramp rx trampver tramp-integration files-x tramp-message
help-mode tramp-compat xdg shell pcomplete parse-time iso8601 time-date
tramp-loaddefs helm-buffers all-the-icons all-the-icons-faces
data-material data-weathericons data-octicons data-fileicons
data-faicons data-alltheicons helm-occur helm-tags helm-locate helm-grep
wgrep-helm wgrep grep compile text-property-search comint ansi-osc ring
helm-regexp format-spec ansi-color helm-utils helm-help helm-types
helm-extensions-autoloads helm-autoloads helm helm-global-bindings
helm-easymenu edmacro kmacro helm-core easy-mmode async-bytecomp
helm-source helm-multi-match helm-lib dired-async async dired-aux dired
dired-loaddefs mb-depth avoid cus-load all-the-icons-autoloads
ledger-mode-autoloads markdown-mode-autoloads info sly-autoloads
w3m-load w3m-autoloads yaml-mode-autoloads package browse-url url
url-proxy url-privacy url-expand url-methods url-history url-cookie
generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs password-cache json subr-x
map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc
iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt
fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode
register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo x-toolkit xinput2 x multi-tty move-toolbar
make-network-process emacs)

Memory information:
((conses 16 592482 85967) (symbols 48 36173 7)
 (strings 32 201919 8354) (string-bytes 1 6423915) (vectors 16 77829)
 (vector-slots 8 1737710 136698) (floats 8 2595 1590)
 (intervals 56 5642 1931) (buffers 976 132))
<#secure method=pgpmime mode=sign>

-- 
Thierry