doc: Delete extraneous quotes around keys

* lisp/allout.el (allout-outlinify-sticky):
* lisp/auth-source.el (auth-sources):
* lisp/buff-menu.el (Buffer-menu-delete)
(Buffer-menu-delete-backwards, Buffer-menu-save)
(Buffer-menu-execute, Buffer-menu-select):
* lisp/calendar/todo-mode.el (todo-show)
(todo-show-categories-table, todo-top-priorities-overrides):
* lisp/desktop.el (desktop-save-mode):
* lisp/dired-aux.el (dired-do-kill-lines, dired-do-copy):
* lisp/edmacro.el (edit-kbd-macro):
* lisp/emulation/viper-cmd.el (viper-ask-level):
* lisp/emulation/viper-init.el (viper-expert-level):
* lisp/filesets.el (filesets-add-buffer):
* lisp/follow.el (follow-mode):
* lisp/gnus/gnus-group.el (gnus-group-mode):
* lisp/gnus/gnus-sum.el (gnus-summary-mode):
* lisp/ibuffer.el (ibuffer-mode):
* lisp/international/ogonek.el (ogonek-informacja)
(ogonek-information):
* lisp/isearch.el (search-default-mode):
* lisp/macros.el (apply-macro-to-region-lines):
* lisp/mail/supercite.el (sc-mail-field-query)
(sc-insert-reference, sc-insert-citation):
* lisp/play/decipher.el (decipher-make-checkpoint):
(decipher-restore-checkpoint):
* lisp/progmodes/idlw-shell.el (idlwave-shell-mode):
* lisp/progmodes/idlwave.el (idlwave-store-inquired-class):
* lisp/progmodes/prolog.el (prolog-mode, prolog-inferior-mode):
* lisp/progmodes/sh-script.el (sh-set-shell):
* lisp/progmodes/vhdl-mode.el (vhdl-compiler-alist)
(vhdl-modify-date-prefix-string)
(vhdl-modify-date-on-saving, vhdl-mode):
* lisp/server.el (server-start):
* lisp/subr.el (locate-library):
* lisp/tempo.el (tempo-marks, tempo-use-tag-list):
* lisp/time.el (world-clock):
* lisp/vc/vc-hooks.el (vc-mode):
* lisp/whitespace.el (whitespace-report-region):
* lisp/windmove.el (windmove-delete-in-direction): Doc fix: Delete
extraneous quotes around keys.

lisp/subr.el

@@ -3102,7 +3102,7 @@ instead."
 LIBRARY should be a relative file name of the library, a string.
 It can omit the suffix (a.k.a. file-name extension) if NOSUFFIX is
 nil (which is the default, see below).
-This command searches the directories in `load-path' like `\\[load-library]'
+This command searches the directories in `load-path' like \\[load-library]
 to find the file that `\\[load-library] RET LIBRARY RET' would load.
 Optional second arg NOSUFFIX non-nil means don't add suffixes `load-suffixes'
 to the specified name LIBRARY.