org-src-font-lock-fontify-block creates an uninitialized
native-tab-width variable and then, when there is no language set on a
block, ends up using it.  This triggers an error.

* lisp/org/org-persist.el: Minor cleanup.
(org-persist-directory, org-persist-remote-files)
(org-persist-default-expiry): Remove redundant `:group` arg.
(org-persist-collection-let): Document lack of hygiene.
Remove `with-no-warnings`.
(org-persist--find-index): Reindent, and simplify initialization of `r`.
(org-persist-associated-files:generic): Move before first use.

* lisp/org/org-compat.el (org-replace-buffer-contents): Delete function.
(org-replace-region-contents): New function.
* lisp/org/org-src.el (org-edit-src-save, org-edit-src-exit): Use it.

* configure.ac (libgccjit_not_found_err)
(libgccjit_dev_not_found_err):
* doc/emacs/buffers.texi (List Buffers):
* doc/lispref/elisp.texi (Tree-sitter C API):
* doc/lispref/functions.texi (What Is a Function):
* doc/lispref/parsing.texi (Parsing Program Source)
(Tree-sitter C API):
* doc/misc/gnus.texi (The Gnus Registry):
* etc/DEBUG:
* etc/NEWS:
* etc/NEWS.25:
* etc/NEWS.26:
* etc/NEWS.28:
* etc/NEWS.30:
* etc/TODO:
* lib-src/emacsclient.c (print_help_and_exit):
* lisp/auth-source.el (auth-source-search):
* lisp/cedet/semantic/bovine/el.el (emacs-lisp-mode):
* lisp/cedet/semantic/wisent/comp.el
(wisent-automaton-lisp-form):
* lisp/cedet/srecode/el.el (srecode-semantic-apply-tag-to-dict):
* lisp/editorconfig.el
(editorconfig-get-local-variables-functions):
* lisp/emacs-lisp/bindat.el (bindat-type):
* lisp/emacs-lisp/byte-opt.el (byte-compile-inline-expand):
* lisp/emacs-lisp/cconv.el (cconv-make-interpreted-closure):
* lisp/emacs-lisp/cl-macs.el (cl--labels-convert):
* lisp/emacs-lisp/lisp-mode.el (lisp-fdefs)
(lisp-fill-paragraphs-as-doc-string):
* lisp/emacs-lisp/macroexp.el (macroexp--fgrep):
* lisp/emacs-lisp/oclosure.el (cconv--interactive-helper):
* lisp/emacs-lisp/re-builder.el:
* lisp/erc/erc-button.el (erc-emacswiki-lisp-url):
* lisp/help-fns.el
(help-fns--describe-function-or-command-prompt):
* lisp/menu-bar.el (menu-bar-search-documentation-menu):
* lisp/net/tramp-message.el (tramp-debug-font-lock-keywords):
* lisp/org/org-capture.el (org-capture):
* lisp/org/org.el (org-category, org-todo):
* lisp/org/ox.el (org-export-async-start):
* lisp/progmodes/elisp-mode.el (emacs-lisp-mode):
* lisp/progmodes/peg.el (peg-translate-exp):
* lisp/progmodes/ruby-ts-mode.el:
* lisp/woman.el (woman-mode, woman-parse-numeric-arg):
* src/chartab.c (map_char_table_for_charset):
* src/fns.c (extract_data_from_object):
* src/frame.c (do_switch_frame):
* src/keyboard.c (make_lispy_event):
* test/lisp/emacs-lisp/cl-macs-tests.el (cl-&key-arguments):
* test/lisp/emacs-lisp/shortdoc-tests.el
(shortdoc-help-fns-examples-function-test):
* test/manual/etags/c-src/emacs/src/keyboard.c
(make_lispy_event): Fix capitalization ELisp -> Elisp.

This fixes Bug#69865.

* lisp/org/ob-exp.el (org-babel-exp--at-source):
* test/lisp/dired-tests.el (dired-test-with-temp-dirs):
* test/lisp/emacs-lisp/package-tests.el (with-fake-help-buffer):
Fix broken edebug specs (debug body) -> (debug (body)).

* lisp/org/ox-publish.el (org-publish-timestamp-filename): Remove
Emacs 23 compat code.

* lisp/org/org-element-ast.el (org-element-create): Address FIXME.

* lisp/erc/erc.el (erc-format-message):
* lisp/obsolete/thumbs.el (thumbs-emboss-image):
* lisp/org/org-capture.el (org-capture-escaped-%):
* lisp/org/org-element-ast.el (org-element-create):
* lisp/org/org-macro.el (org-macro-extract-arguments):
* lisp/org/org-persist.el (org-persist--get-collection):
* lisp/org/ox-odt.el (org-odt-get-table-cell-styles):
* lisp/org/ox.el (org-export--dispatch-ui):
* lisp/progmodes/cperl-mode.el (cperl-forward-re)
(cperl-find-pods-heres): Prefer 'cl-evenp/'cl-oddp' to free-coding them
in some files that already depend on cl-lib in run-time.

* lisp/org/ob-core.el (org-babel-process-params):
* lisp/org/org-agenda.el (org-agenda-span-to-ndays):
* lisp/org/org-capture.el (org-capture-set-target-location):
* lisp/org/org.el (org-set-effort): Don't use cl-caaar, cl-caadr,
etc. compatibility macros in Org.  We don't need to use them, since Org
requires Emacs 26.1.

This is not just stylistic, but also slightly faster.  These are all
regular defuns, of course, as this won't work with macros and defsubsts.

* lisp/calc/calc-nlfit.el (math-nlfit-fit-curve)
(calc-fit-hubbert-linear-curve):
* lisp/calendar/cal-tex.el (cal-tex-latexify-list):
* lisp/calendar/todo-mode.el (todo-sort):
* lisp/cedet/semantic/ctxt.el (semantic-ctxt-end-of-symbol-default)
(semantic-ctxt-current-symbol-default):
* lisp/cedet/semantic/symref.el (semantic-symref-result-get-files):
* lisp/cedet/semantic/texi.el (semantic-texi-command-completion-list):
* lisp/descr-text.el (describe-char):
* lisp/emacs-lisp/eieio-datadebug.el
(data-debug-add-specialized-thing):
* lisp/emacs-lisp/rmc.el (read-multiple-choice--short-answers):
* lisp/eshell/em-pred.el (eshell-modifier-alist):
* lisp/gnus/gnus-cache.el (gnus-cache-articles-in-group):
* lisp/gnus/gnus-dired.el (gnus-dired-attach):
* lisp/help-mode.el (help-package-def):
* lisp/ibuf-ext.el (ibuffer-mark-modified-buffers):
* lisp/image/image-dired.el:
* lisp/international/quail.el (quail-keyseq-translate)
(quail-get-translations):
* lisp/isearch.el (isearch-pre-command-hook)
(search-within-boundaries):
* lisp/mail/supercite.el (sc-ask):
* lisp/mh-e/mh-e.el (mh-variant-set):
* lisp/net/rcirc.el (rcirc-nick-channels, rcirc-channel-nicks):
(rcirc-browse-url):
* lisp/obsolete/thumbs.el (thumbs-cleanup-thumbsdir):
* lisp/org/org-agenda.el (org-agenda-filter-completion-function):
* lisp/org/org-table.el (org-table-eval-formula):
* lisp/org/org.el (org-set-regexps-and-options):
* lisp/org/ox.el (org-export--get-inbuffer-options):
* lisp/ses.el (ses-range):
* lisp/textmodes/emacs-news-mode.el (emacs-news--buttonize):
* lisp/textmodes/ispell.el (ispell-begin-tex-skip-regexp):
* lisp/vc/vc-cvs.el (vc-cvs-stay-local-p):
* lisp/window.el (window--state-get-1):
* test/lisp/emacs-lisp/shortdoc-tests.el (shortdoc-all-groups-work):
Delete redundant lambdas around unary functions.  (Bug#66816)