Quote some literal keys to get help-key-binding face

* lisp/align.el (align):
* lisp/bindings.el (undo-repeat-map):
* lisp/calc/calc-embed.el (calc-do-embedded):
* lisp/calc/calc-prog.el (calc-user-define-invocation):
* lisp/calc/calc-yank.el (calc--edit-mode):
* lisp/comint.el (comint-history-isearch)
* lisp/dired.el (dired-mode):
* lisp/emulation/viper.el (viper-mode):
* lisp/erc/erc-button.el (erc-button-face):
* lisp/erc/erc-track.el (erc-track-enable-keybindings):
* lisp/gnus/gnus-art.el (gnus-article-button-face):
* lisp/gnus/gnus-eform.el (gnus-edit-form):
* lisp/gnus/gnus-sum.el (gnus-summary-stop-at-end-of-message)
(gnus-summary-goto-unread):
* lisp/icomplete.el (icomplete-show-matches-on-no-input):
* lisp/image-mode.el (image-scroll-up):
* lisp/international/iso-transl.el (iso-transl-set-language):
* lisp/isearch.el (isearch-forward-regexp):
* lisp/misc.el (butterfly):
* lisp/outline.el (outline-minor-mode-cycle-filter)
(outline-minor-mode-cycle):
* lisp/progmodes/grep.el (rgrep):
* lisp/progmodes/gud.el (gud-gdb-repeat-map, gud-sdb-repeat-map)
(gud-dbx-repeat-map, gud-xdb-repeat-map, gud-perldb-repeat-map)
(gud-pdb-repeat-map, gud-guiler-repeat-map, gud-jdb-repeat-map):
* lisp/progmodes/idlw-shell.el (idlwave-shell-graphics-window-size)
(idlwave-shell-mode):
* lisp/progmodes/idlwave.el (idlwave-shell-debug-modifiers)
(idlwave-list-shell-load-path-shadows):
* lisp/progmodes/python.el (python-shell-get-process-or-error):
* lisp/repeat.el (repeat-check-key):
* lisp/replace.el (query-replace, query-replace-regexp)
(read-regexp):
* lisp/simple.el (read-extended-command-predicate):
* lisp/tab-bar.el (tab-bar-switch-repeat-map)
(tab-bar-move-repeat-map):
* lisp/term.el (ansi-term):
* lisp/textmodes/reftex-index.el (reftex-index-phrases-set-macro-key):
* lisp/vc/emerge.el (emerge-scroll-left, emerge-scroll-right):
* lisp/windmove.el:
* lisp/winner.el (winner-mode): Quote literal keys to get
'help-key-binding' face.
* lisp/comint.el (comint-insert-previous-argument): Use regular
quotes.

lisp/misc.el

@@ -151,7 +151,7 @@ ripples outward, changing the flow of the eddy currents in the
 upper atmosphere.  These cause momentary pockets of higher-pressure
 air to form, which act as lenses that deflect incoming cosmic rays,
 focusing them to strike the drive platter and flip the desired bit.
-You can type `M-x butterfly C-M-c' to run it.  This is a permuted
+You can type \\`M-x butterfly C-M-c' to run it.  This is a permuted
 variation of `C-x M-c M-butterfly' from url `https://xkcd.com/378/'."
   (interactive)
   (if (yes-or-no-p "Do you really want to unleash the powers of the butterfly? ")