* lisp/emulation/edt.el:
* lisp/emulation/edt-lk201.el:
* lisp/emulation/edt-mapper.el:
* lisp/emulation/edt-pc.el:
* lisp/emulation/edt-vt100.el:
* etc/edt-user.el:
* doc/misc/edt.texi: Update Kevin Gallagher's email address.

* lisp/desktop.el (desktop-minor-mode-table):
* lisp/man.el (Man-frame-parameters):
* lisp/midnight.el (midnight-delay):
* lisp/speedbar.el (speedbar-select-frame-method):
* lisp/tooltip.el (tooltip-frame-parameters):
* lisp/tree-widget.el (tree-widget-space-width):
* lisp/type-break.el (type-break-keystroke-threshold):
* lisp/woman.el (woman-imenu-generic-expression):
* lisp/cedet/ede.el (ede-debug-program-function):
* lisp/cedet/ede/project-am.el (project-am-debug-target-function):
* lisp/emulation/viper-keym.el (viper-toggle-key):
* lisp/erc/erc-networks.el (erc-server-alist):
* lisp/gnus/message.el (message-deletable-headers, message-signature):
* lisp/mail/mailalias.el (mail-directory-stream):
* lisp/play/tetris.el (tetris-x-colors):
* lisp/progmodes/gud.el (gud-tooltip-modes): Improve custom type.

Run admin/update-copyright.

Problem reported by Artur Malabarba in:
http://lists.gnu.org/archive/html/emacs-devel/2015-11/msg01513.html
Most of these fixes are to documentation; many involve fixing
longstanding quoting glitches that are independent of the
recent substitute-command-keys changes.  The changes to code are:
* lisp/cedet/mode-local.el (mode-local-augment-function-help)
(describe-mode-local-overload):
Substitute docstrings before displaying them.
* lisp/emacs-lisp/cl-macs.el (cl--transform-lambda):
Quote the generated docstring for later substitution.

* lisp/simple.el (region-extract-function): Handle the arg value ‘bounds’.
(region-insert-function): New function.
(shell-command-on-region): Add arg ‘region-noncontiguous-p’.
If non-nil, operate on multiple chunks.
(region-noncontiguous-p): New function.

* lisp/rect.el: Add function rectangle--insert-region
around region-insert-function.
(extract-rectangle-bounds): New function.
(rectangle--extract-region): Handle the arg value ‘bounds’.
(rectangle--insert-region): New function.

* lisp/emulation/cua-rect.el: Add function cua--insert-rectangle
around region-insert-function.
(cua--extract-rectangle-bounds): New function.
(cua--rectangle-region-extract): Handle the arg value ‘bounds’.

* lisp/replace.el (query-replace, query-replace-regexp): Add arg
‘region-noncontiguous-p’.  Use ‘use-region-p’.
(query-replace-regexp-eval, map-query-replace-regexp)
(replace-string, replace-regexp): Use ‘use-region-p’.
(keep-lines, flush-lines, how-many): Use ‘use-region-p’.
(perform-replace): Add arg ‘region-noncontiguous-p’.
If non-nil, operate on multiple chunks.

* src/casefiddle.c (Fdowncase_region): Add arg ‘region-noncontiguous-p’.
If non-nil, operate on multiple chunks. (Bug#19829)

This patch should not change behavior.  It typically omits backslashes
where they are redundant (e.g., in the string literal "^\$").
In a few places, insert backslashes where they make regular
expressions clearer: e.g., replace "^\*" (equivalent to "^*") with
"^\\*", which has the same effect as a regular expression.
Also, use ‘\ %’ instead of ‘\%’ when avoiding confusion with SCCS IDs,
and similarly use ‘\ $’ instead of ‘\$’ when avoiding confusion with
RCS IDs, as that makes it clearer that the backslash is intended.

* lisp/calendar/todo-mode.el (todo-files, todo-rename-file)
(todo-find-filtered-items-file, todo-reset-nondiary-marker)
(todo-reset-done-string, todo-reset-comment-string)
(todo-reset-highlight-item):
* lisp/erc/erc-networks.el (erc-networks-alist):
* lisp/gnus/gnus-art.el (gnus-button-handle-library):
* lisp/gnus/gnus-group.el (gnus-read-ephemeral-gmane-group-url):
* lisp/gnus/nntp.el (nntp-via-shell-prompt)
(nntp-telnet-shell-prompt):
* lisp/gnus/spam-report.el (spam-report-gmane-regex):
* lisp/image-dired.el (image-dired-rotate-original):
(image-dired-get-exif-file-name):
* lisp/international/latin1-disp.el (latin1-display-ucs-per-lynx):
* lisp/mail/undigest.el (rmail-digest-parse-rfc1153strict):
* lisp/mh-e/mh-letter.el (mh-file-is-vcard-p):
* lisp/mh-e/mh-mime.el (mh-file-mime-type-substitutions):
* lisp/net/shr-color.el (shr-color->hexadecimal):
* lisp/org/org-bibtex.el (org-bibtex-fields):
* lisp/org/org-docview.el (org-docview-export):
* lisp/org/org-entities.el (org-entities):
* lisp/org/ox-icalendar.el (org-icalendar-cleanup-string):
* lisp/progmodes/cperl-mode.el (cperl-indent-exp):
* lisp/progmodes/ebnf2ps.el (ebnf-file-suffix-regexp)
(ebnf-style-database):
* lisp/progmodes/idlw-help.el (idlwave-do-context-help1):
* lisp/progmodes/ruby-mode.el (ruby-imenu-create-index-in-block):
* lisp/progmodes/sql.el (sql-product-alist):
* lisp/progmodes/verilog-mode.el (verilog-error-regexp-emacs-alist)
(verilog-error-font-lock-keywords)
(verilog-assignment-operator-re):
* lisp/progmodes/vhdl-mode.el (vhdl-compiler-alist):
* lisp/textmodes/reftex-parse.el (reftex-parse-from-file):
* lisp/vc/add-log.el (change-log-version-number-regexp-list):
Fix typo by replacing ‘\’ with ‘\\’ in a string literal.
For example, to get the regular expression ‘\.’ use the string
literal "\\.", not "\." (which is equivalent to ".").
* lisp/emulation/viper-util.el (viper-glob-unix-files):
Remove stray ‘\j’ from string.
* lisp/gnus/nntp.el (nntp-via-shell-prompt)
(nntp-telnet-shell-prompt):
Treat > like $ when matching a shell prompt.
* lisp/progmodes/make-mode.el (makefile-browse):
Properly quote a diagnostic.

This reverts almost all my recent changes to use curved quotes
in docstrings and/or strings used for error diagnostics.
There are a few exceptions, e.g., Bahá’í proper names.
* admin/unidata/unidata-gen.el (unidata-gen-table):
* lisp/abbrev.el (expand-region-abbrevs):
* lisp/align.el (align-region):
* lisp/allout.el (allout-mode, allout-solicit-alternate-bullet)
(outlineify-sticky):
* lisp/apropos.el (apropos-library):
* lisp/bookmark.el (bookmark-default-annotation-text):
* lisp/button.el (button-category-symbol, button-put)
(make-text-button):
* lisp/calc/calc-aent.el (math-read-if, math-read-factor):
* lisp/calc/calc-embed.el (calc-do-embedded):
* lisp/calc/calc-ext.el (calc-user-function-list):
* lisp/calc/calc-graph.el (calc-graph-show-dumb):
* lisp/calc/calc-help.el (calc-describe-key)
(calc-describe-thing, calc-full-help):
* lisp/calc/calc-lang.el (calc-c-language)
(math-parse-fortran-vector-end, math-parse-tex-sum)
(math-parse-eqn-matrix, math-parse-eqn-prime)
(calc-yacas-language, calc-maxima-language, calc-giac-language)
(math-read-giac-subscr, math-read-math-subscr)
(math-read-big-rec, math-read-big-balance):
* lisp/calc/calc-misc.el (calc-help, report-calc-bug):
* lisp/calc/calc-mode.el (calc-auto-why, calc-save-modes)
(calc-auto-recompute):
* lisp/calc/calc-prog.el (calc-fix-token-name)
(calc-read-parse-table-part, calc-user-define-invocation)
(math-do-arg-check):
* lisp/calc/calc-store.el (calc-edit-variable):
* lisp/calc/calc-units.el (math-build-units-table-buffer):
* lisp/calc/calc-vec.el (math-read-brackets):
* lisp/calc/calc-yank.el (calc-edit-mode):
* lisp/calc/calc.el (calc, calc-do, calc-user-invocation):
* lisp/calendar/appt.el (appt-display-message):
* lisp/calendar/diary-lib.el (diary-check-diary-file)
(diary-mail-entries, diary-from-outlook):
* lisp/calendar/icalendar.el (icalendar-export-region)
(icalendar--convert-float-to-ical)
(icalendar--convert-date-to-ical)
(icalendar--convert-ical-to-diary)
(icalendar--convert-recurring-to-diary)
(icalendar--add-diary-entry):
* lisp/calendar/time-date.el (format-seconds):
* lisp/calendar/timeclock.el (timeclock-mode-line-display)
(timeclock-make-hours-explicit, timeclock-log-data):
* lisp/calendar/todo-mode.el (todo-prefix, todo-delete-category)
(todo-item-mark, todo-check-format)
(todo-insert-item--next-param, todo-edit-item--next-key)
(todo-mode):
* lisp/cedet/ede/pmake.el (ede-proj-makefile-insert-dist-rules):
* lisp/cedet/mode-local.el (describe-mode-local-overload)
(mode-local-print-binding, mode-local-describe-bindings-2):
* lisp/cedet/semantic/complete.el (semantic-displayor-show-request):
* lisp/cedet/srecode/srt-mode.el (srecode-macro-help):
* lisp/cus-start.el (standard):
* lisp/cus-theme.el (describe-theme-1):
* lisp/custom.el (custom-add-dependencies, custom-check-theme)
(custom--sort-vars-1, load-theme):
* lisp/descr-text.el (describe-text-properties-1, describe-char):
* lisp/dired-x.el (dired-do-run-mail):
* lisp/dired.el (dired-log):
* lisp/emacs-lisp/advice.el (ad-read-advised-function)
(ad-read-advice-class, ad-read-advice-name, ad-enable-advice)
(ad-disable-advice, ad-remove-advice, ad-set-argument)
(ad-set-arguments, ad--defalias-fset, ad-activate)
(ad-deactivate):
* lisp/emacs-lisp/byte-opt.el (byte-compile-inline-expand)
(byte-compile-unfold-lambda, byte-optimize-form-code-walker)
(byte-optimize-while, byte-optimize-apply):
* lisp/emacs-lisp/byte-run.el (defun, defsubst):
* lisp/emacs-lisp/bytecomp.el (byte-compile-lapcode)
(byte-compile-log-file, byte-compile-format-warn)
(byte-compile-nogroup-warn, byte-compile-arglist-warn)
(byte-compile-cl-warn)
(byte-compile-warn-about-unresolved-functions)
(byte-compile-file, byte-compile--declare-var)
(byte-compile-file-form-defmumble, byte-compile-form)
(byte-compile-normal-call, byte-compile-check-variable)
(byte-compile-variable-ref, byte-compile-variable-set)
(byte-compile-subr-wrong-args, byte-compile-setq-default)
(byte-compile-negation-optimizer)
(byte-compile-condition-case--old)
(byte-compile-condition-case--new, byte-compile-save-excursion)
(byte-compile-defvar, byte-compile-autoload)
(byte-compile-lambda-form)
(byte-compile-make-variable-buffer-local, display-call-tree)
(batch-byte-compile):
* lisp/emacs-lisp/cconv.el (cconv-convert, cconv--analyze-use):
* lisp/emacs-lisp/chart.el (chart-space-usage):
* lisp/emacs-lisp/check-declare.el (check-declare-scan)
(check-declare-warn, check-declare-file)
(check-declare-directory):
* lisp/emacs-lisp/checkdoc.el (checkdoc-this-string-valid-engine)
(checkdoc-message-text-engine):
* lisp/emacs-lisp/cl-extra.el (cl-parse-integer)
(cl--describe-class):
* lisp/emacs-lisp/cl-generic.el (cl-defgeneric)
(cl--generic-describe, cl-generic-generalizers):
* lisp/emacs-lisp/cl-macs.el (cl--parse-loop-clause, cl-tagbody)
(cl-symbol-macrolet):
* lisp/emacs-lisp/cl.el (cl-unload-function, flet):
* lisp/emacs-lisp/copyright.el (copyright)
(copyright-update-directory):
* lisp/emacs-lisp/edebug.el (edebug-read-list):
* lisp/emacs-lisp/eieio-base.el (eieio-persistent-read):
* lisp/emacs-lisp/eieio-core.el (eieio--slot-override)
(eieio-oref):
* lisp/emacs-lisp/eieio-opt.el (eieio-help-constructor):
* lisp/emacs-lisp/eieio-speedbar.el:
(eieio-speedbar-child-make-tag-lines)
(eieio-speedbar-child-description):
* lisp/emacs-lisp/eieio.el (defclass, change-class):
* lisp/emacs-lisp/elint.el (elint-file, elint-get-top-forms)
(elint-init-form, elint-check-defalias-form)
(elint-check-let-form):
* lisp/emacs-lisp/ert.el (ert-get-test, ert-results-mode-menu)
(ert-results-pop-to-backtrace-for-test-at-point)
(ert-results-pop-to-messages-for-test-at-point)
(ert-results-pop-to-should-forms-for-test-at-point)
(ert-describe-test):
* lisp/emacs-lisp/find-func.el (find-function-search-for-symbol)
(find-function-library):
* lisp/emacs-lisp/generator.el (iter-yield):
* lisp/emacs-lisp/gv.el (gv-define-simple-setter):
* lisp/emacs-lisp/lisp-mnt.el (lm-verify):
* lisp/emacs-lisp/macroexp.el (macroexp--obsolete-warning):
* lisp/emacs-lisp/map-ynp.el (map-y-or-n-p):
* lisp/emacs-lisp/nadvice.el (advice--make-docstring)
(advice--make, define-advice):
* lisp/emacs-lisp/package-x.el (package-upload-file):
* lisp/emacs-lisp/package.el (package-version-join)
(package-disabled-p, package-activate-1, package-activate)
(package--download-one-archive)
(package--download-and-read-archives)
(package-compute-transaction, package-install-from-archive)
(package-install, package-install-selected-packages)
(package-delete, package-autoremove, describe-package-1)
(package-install-button-action, package-delete-button-action)
(package-menu-hide-package, package-menu--list-to-prompt)
(package-menu--perform-transaction)
(package-menu--find-and-notify-upgrades):
* lisp/emacs-lisp/pcase.el (pcase-exhaustive, pcase--u1):
* lisp/emacs-lisp/re-builder.el (reb-enter-subexp-mode):
* lisp/emacs-lisp/ring.el (ring-previous, ring-next):
* lisp/emacs-lisp/rx.el (rx-check, rx-anything)
(rx-check-any-string, rx-check-any, rx-check-not, rx-=)
(rx-repeat, rx-check-backref, rx-syntax, rx-check-category)
(rx-form):
* lisp/emacs-lisp/smie.el (smie-config-save):
* lisp/emacs-lisp/subr-x.el (internal--check-binding):
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-put-tag):
* lisp/emacs-lisp/testcover.el (testcover-1value):
* lisp/emacs-lisp/timer.el (timer-event-handler):
* lisp/emulation/viper-cmd.el (viper-toggle-parse-sexp-ignore-comments)
(viper-toggle-search-style, viper-kill-buffer)
(viper-brac-function):
* lisp/emulation/viper-macs.el (viper-record-kbd-macro):
* lisp/env.el (setenv):
* lisp/erc/erc-button.el (erc-nick-popup):
* lisp/erc/erc.el (erc-cmd-LOAD, erc-handle-login, english):
* lisp/eshell/em-dirs.el (eshell/cd):
* lisp/eshell/em-glob.el (eshell-glob-regexp)
(eshell-glob-entries):
* lisp/eshell/em-pred.el (eshell-parse-modifiers):
* lisp/eshell/esh-opt.el (eshell-show-usage):
* lisp/facemenu.el (facemenu-add-new-face)
(facemenu-add-new-color):
* lisp/faces.el (read-face-name, read-face-font, describe-face)
(x-resolve-font-name):
* lisp/files-x.el (modify-file-local-variable):
* lisp/files.el (locate-user-emacs-file, find-alternate-file)
(set-auto-mode, hack-one-local-variable--obsolete)
(dir-locals-set-directory-class, write-file, basic-save-buffer)
(delete-directory, copy-directory, recover-session)
(recover-session-finish, insert-directory)
(file-modes-char-to-who, file-modes-symbolic-to-number)
(move-file-to-trash):
* lisp/filesets.el (filesets-add-buffer, filesets-remove-buffer):
* lisp/find-cmd.el (find-generic, find-to-string):
* lisp/finder.el (finder-commentary):
* lisp/font-lock.el (font-lock-fontify-buffer):
* lisp/format.el (format-write-file, format-find-file)
(format-insert-file):
* lisp/frame.el (get-device-terminal, select-frame-by-name):
* lisp/fringe.el (fringe--check-style):
* lisp/gnus/nnmairix.el (nnmairix-widget-create-query):
* lisp/help-fns.el (help-fns--key-bindings)
(help-fns--compiler-macro, help-fns--parent-mode)
(help-fns--obsolete, help-fns--interactive-only)
(describe-function-1, describe-variable):
* lisp/help.el (describe-mode)
(describe-minor-mode-from-indicator):
* lisp/image.el (image-type):
* lisp/international/ccl.el (ccl-dump):
* lisp/international/fontset.el (x-must-resolve-font-name):
* lisp/international/mule-cmds.el (prefer-coding-system)
(select-safe-coding-system-interactively)
(select-safe-coding-system, activate-input-method)
(toggle-input-method, describe-current-input-method)
(describe-language-environment):
* lisp/international/mule-conf.el (code-offset):
* lisp/international/mule-diag.el (describe-character-set)
(list-input-methods-1):
* lisp/mail/feedmail.el (feedmail-run-the-queue):
* lisp/mouse.el (minor-mode-menu-from-indicator):
* lisp/mpc.el (mpc-playlist-rename):
* lisp/msb.el (msb--choose-menu):
* lisp/net/ange-ftp.el (ange-ftp-shell-command):
* lisp/net/imap.el (imap-interactive-login):
* lisp/net/mairix.el (mairix-widget-create-query):
* lisp/net/newst-backend.el (newsticker--sentinel-work):
* lisp/net/newst-treeview.el (newsticker--treeview-load):
* lisp/net/rlogin.el (rlogin):
* lisp/obsolete/iswitchb.el (iswitchb-possible-new-buffer):
* lisp/obsolete/otodo-mode.el (todo-more-important-p):
* lisp/obsolete/pgg-gpg.el (pgg-gpg-process-region):
* lisp/obsolete/pgg-pgp.el (pgg-pgp-process-region):
* lisp/obsolete/pgg-pgp5.el (pgg-pgp5-process-region):
* lisp/org/ob-core.el (org-babel-goto-named-src-block)
(org-babel-goto-named-result):
* lisp/org/ob-fortran.el (org-babel-fortran-ensure-main-wrap):
* lisp/org/ob-ref.el (org-babel-ref-resolve):
* lisp/org/org-agenda.el (org-agenda-prepare):
* lisp/org/org-clock.el (org-clock-notify-once-if-expired)
(org-clock-resolve):
* lisp/org/org-ctags.el (org-ctags-ask-rebuild-tags-file-then-find-tag):
* lisp/org/org-feed.el (org-feed-parse-atom-entry):
* lisp/org/org-habit.el (org-habit-parse-todo):
* lisp/org/org-mouse.el (org-mouse-popup-global-menu)
(org-mouse-context-menu):
* lisp/org/org-table.el (org-table-edit-formulas):
* lisp/org/ox.el (org-export-async-start):
* lisp/proced.el (proced-log):
* lisp/progmodes/ada-mode.el (ada-get-indent-case)
(ada-check-matching-start, ada-goto-matching-start):
* lisp/progmodes/ada-prj.el (ada-prj-display-page):
* lisp/progmodes/ada-xref.el (ada-find-executable):
* lisp/progmodes/ebrowse.el (ebrowse-tags-apropos):
* lisp/progmodes/etags.el (etags-tags-apropos-additional):
* lisp/progmodes/flymake.el (flymake-parse-err-lines)
(flymake-start-syntax-check-process):
* lisp/progmodes/python.el (python-shell-get-process-or-error)
(python-define-auxiliary-skeleton):
* lisp/progmodes/sql.el (sql-comint):
* lisp/progmodes/verilog-mode.el (verilog-load-file-at-point):
* lisp/progmodes/vhdl-mode.el (vhdl-widget-directory-validate):
* lisp/recentf.el (recentf-open-files):
* lisp/replace.el (query-replace-read-from)
(occur-after-change-function, occur-1):
* lisp/scroll-bar.el (scroll-bar-columns):
* lisp/server.el (server-get-auth-key):
* lisp/simple.el (execute-extended-command)
(undo-outer-limit-truncate, list-processes--refresh)
(compose-mail, set-variable, choose-completion-string)
(define-alternatives):
* lisp/startup.el (site-run-file, tty-handle-args, command-line)
(command-line-1):
* lisp/subr.el (noreturn, define-error, add-to-list)
(read-char-choice, version-to-list):
* lisp/term/common-win.el (x-handle-xrm-switch)
(x-handle-name-switch, x-handle-args):
* lisp/term/x-win.el (x-handle-parent-id, x-handle-smid):
* lisp/textmodes/reftex-ref.el (reftex-label):
* lisp/textmodes/reftex-toc.el (reftex-toc-rename-label):
* lisp/textmodes/two-column.el (2C-split):
* lisp/tutorial.el (tutorial--describe-nonstandard-key)
(tutorial--find-changed-keys):
* lisp/type-break.el (type-break-noninteractive-query):
* lisp/wdired.el (wdired-do-renames, wdired-do-symlink-changes)
(wdired-do-perm-changes):
* lisp/whitespace.el (whitespace-report-region):
Prefer grave quoting in source-code strings used to generate help
and diagnostics.
* lisp/faces.el (face-documentation):
No need to convert quotes, since the result is a docstring.
* lisp/info.el (Info-virtual-index-find-node)
(Info-virtual-index, info-apropos):
Simplify by generating only curved quotes, since info files are
typically that ways nowadays anyway.
* lisp/international/mule-diag.el (list-input-methods):
Don’t assume text quoting style is curved.
* lisp/org/org-bibtex.el (org-bibtex-fields):
Revert my recent changes, going back to the old quoting style.

Mostly these fixes prevent the transliteration of apostrophes
that should stay apostrophes.  Also, prefer curved quotes in
Bahá’í proper names, as that’s the preferred Bahá’í style and
these names are chock-full of non-ASCII characters anyway.
* lisp/emacs-lisp/eieio-core.el (eieio-defclass-autoload)
(eieio-defclass-internal):
* lisp/emacs-lisp/eieio.el (defclass):
* lisp/hi-lock.el (hi-lock-mode):
Don’t transliterate Lisp apostrophes when generating a
doc string or diagnostic.
* lisp/international/mule-diag.el (list-coding-systems-1):
* lisp/international/ogonek.el (ogonek-jak, ogonek-how):
* lisp/mail/sendmail.el (sendmail-query-user-about-smtp):
* lisp/vc/ediff-mult.el (ediff-redraw-registry-buffer):
* lisp/vc/ediff-ptch.el (ediff-fixup-patch-map):
Substitute quotes before putting them in the help buffer.

* lisp/simple.el (prefix-command-echo-keystrokes-functions)
(prefix-command-preserve-state-hook): New hooks.
(internal-echo-keystrokes-prefix): New function.
(prefix-command--needs-update, prefix-command--last-echo): New vars.
(prefix-command-update, prefix-command-preserve): New functions.
(reset-this-command-lengths): New compatibility definition.
(universal-argument--mode): Call prefix-command-update.
(universal-argument, universal-argument-more, negative-argument)
(digit-argument): Call prefix-command-preserve-state.

* src/keyboard.c: Call internal-echo-keystrokes-prefix to build
the "prefix argument" to echo.
(this_command_key_count_reset, before_command_key_count)
(before_command_echo_length): Delete variables.
(echo_add_key): Always add a space.
(echo_char): Remove.
(echo_dash): Don't give up when this_command_key_count is 0, since that
is now the case after a prefix command.
(echo_update): New function, extracted from echo_now.
(echo_now): Use it.
(add_command_key, read_char, record_menu_key): Remove old disabled code.
(command_loop_1): Don't refrain from pushing an undo boundary when
prefix-arg is set.  Remove other prefix-arg special case, now handled
directly in the prefix commands instead.  But call echo_now if there's
a prefix state to echo.
(read_char, record_menu_key): Use echo_update instead of echo_char.
(read_key_sequence): Use echo_now rather than echo_dash/echo_char.
(Freset_this_command_lengths): Delete function.
(syms_of_keyboard): Define Qinternal_echo_keystrokes_prefix.
(syms_of_keyboard): Don't defsubr Sreset_this_command_lengths.

* lisp/simple.el: Use those new hooks for C-u.
(universal-argument--description): New function.
(prefix-command-echo-keystrokes-functions): Use it.
(universal-argument--preserve): New function.
(prefix-command-preserve-state-hook): Use it.
(command-execute): Call prefix-command-update if needed.

* lisp/kmacro.el (kmacro-step-edit-prefix-commands)
(kmacro-step-edit-prefix-index): Delete variables.
(kmacro-step-edit-query, kmacro-step-edit-insert): Remove ad-hoc
support for prefix arg commands.
(kmacro-step-edit-macro): Don't bind kmacro-step-edit-prefix-index.

* lisp/emulation/cua-base.el (cua--prefix-override-replay)
(cua--shift-control-prefix): Use prefix-command-preserve-state.
Remove now unused arg `arg'.
(cua--prefix-override-handler, cua--prefix-repeat-handler)
(cua--shift-control-c-prefix, cua--shift-control-x-prefix):
Update accordingly.
(cua--prefix-override-timeout): Don't call reset-this-command-lengths
any more.
(cua--keep-active, cua-exchange-point-and-mark): Don't set mark-active
if the mark is not set.