bug#73254: 30.0.91; ert-font-lock-deftest-file requires ert-x but does not load it

[Morgan Willcock <morgan@ice9.digital>]

When testing some features of ert-font-lock I found that the
ert-font-lock-deftest-file macro expects ert-x to have been loaded.
Here is an example for `emacs -Q`:

  (require 'ert)
  (require 'ert-font-lock)

  ;; This is the example from the documentation.
  (ert-font-lock-deftest-file test-macro-test--file
      "Test reading correct assertions from a file"
    javascript-mode
    "correct.js")

  (ert t)

This gives the result:

  F test-macro-test--file
      Test reading correct assertions from a file
      (void-function ert-resource-file)

I cannot see anything in the documentation that says to load ert-x and
it seems strange that the macro would be defined to use it without
loading it.


In GNU Emacs 30.0.91 (build 2, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.16.0, Xaw3d scroll bars) of 2024-09-12 built on inspiron
Windowing system distributor 'The X.Org Foundation', version 11.0.12101007
System Description: Debian GNU/Linux 12 (bookworm)

Configured using:
 'configure --with-native-compilation=aot --with-xml2
 --with-x-toolkit=lucid'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG
LIBSELINUX LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG
SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XAW3D
XDBE XIM XINPUT2 XPM LUCID ZLIB

Important settings:
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
  server-mode: t
  global-corfu-mode: t
  corfu-mode: t
  jabber-activity-mode: t
  etags-regen-mode: t
  which-key-mode: t
  global-devil-mode: t
  devil-mode: t
  erc-ring-mode: t
  erc-netsplit-mode: t
  erc-menu-mode: t
  erc-list-mode: t
  erc-irccontrols-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  erc-imenu-mode: t
  erc-pcomplete-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-spelling-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-autojoin-mode: t
  erc-networks-mode: t
  savehist-mode: t
  minibuffer-electric-default-mode: t
  minibuffer-depth-indicate-mode: t
  ido-everywhere: t
  recentf-mode: t
  global-display-fill-column-indicator-mode: t
  display-fill-column-indicator-mode: t
  global-hl-line-mode: t
  display-time-mode: t
  flyspell-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  minibuffer-regexp-mode: t
  buffer-read-only: 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
  view-mode: t

Load-path shadows:
/home/mwillcock/.emacs.d/custom/powershell.el/powershell hides /home/mwillcock/.emacs.d/custom/powershell
/home/mwillcock/.emacs.d/elpa/which-key-3.6.1/which-key hides /usr/local/share/emacs/30.0.91/lisp/which-key
/home/mwillcock/.emacs.d/elpa/modus-themes-4.5.0/theme-loaddefs hides /usr/local/share/emacs/30.0.91/lisp/theme-loaddefs

Features:
(shadow ecomplete emacsbug texinfo texinfo-loaddefs dired-aux pulse
shortdoc ert-x help-fns radix-tree bug-reference view smerge-mode
ert-font-lock make-mode wgrep find-dired ffap grep misearch
multi-isearch vc-annotate checkdoc sort mail-extr textsec uni-scripts
idna-mapping ucs-normalize uni-confusable textsec-check gnus-async
gnus-bcklg qp gnus-ml disp-table mm-archive mule-util package-vc vc
lisp-mnt url-cache url-http url-auth url-gw display-line-numbers
finder-inf gnus-topic nndraft nnmh utf-7 cursor-sensor epa-file
network-stream nsm nnfolder nnnil gnus-agent gnus-srvr gnus-score
score-mode nnvirtual nntp gnus-cache server cal-iso autorevert
face-remap init corfu sly sly-completion sly-buttons sly-messages
sly-common apropos etags fileloop arc-mode archive-mode hyperspec
powershell php-mode mode-local consult-imenu consult php-face php
php-project jabber jabber-ourversion hippie-exp hexrgb fsm sgml-mode
facemenu srv dns starttls tls goto-addr yaml-mode markdown-mode lua-mode
advice edmacro kmacro etags-regen kixtart-docstrings cape kixtart-mode
tempo org-msg let-alist color ox-odt rng-loc rng-uri rng-parse rng-match
rng-dt rng-util rng-pttrn nxml-parse nxml-ns nxml-enc xmltok nxml-util
ox-latex ox-icalendar ox-html table ox-ascii ox-publish ox org-attach
htmlize gnus-msg gnus-icalendar icalendar gnus-dired gnus-cite which-key
devil delight comp comp-cstr ags-mode speedbar ezimage dframe shadowfile
eglot jsonrpc xref flymake diff ert ewoc debug backtrace warnings python
project cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align
cc-engine cc-vars cc-defs erc-ring erc-netsplit erc-menu erc-list
erc-goodies erc-imenu imenu erc-pcomplete erc-button erc-fill erc-stamp
erc-sasl erc-sasl-ecdsa-nist256p-challenge erc-sasl-scram-sha-512
erc-sasl-scram-sha-256 erc-sasl-scram-sha-1 erc-sasl-external
erc-sasl-plain sasl-scram-sha256 sasl-scram-rfc sasl-scram-sha-1 rfc2104
hex-util sasl sasl-anonymous sasl-login sasl-plain erc-spelling
erc-track erc-match erc-join erc erc-backend erc-networks erc-common
erc-compat compat erc-loaddefs ediff ediff-merg ediff-mult ediff-wind
ediff-diff ediff-help ediff-init ediff-util vc-git diff-mode
track-changes vc-dispatcher org-indent oc-basic cl-extra ol-eww eww
url-queue mm-url ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect
gnus-art mm-uu mml2015 gnus-sum ol-docview doc-view filenotify jka-compr
image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m ol-doi org-link-doi appt
diary-lib diary-loaddefs org-capture ob-shell ob-plantuml ob-dot
org-goto org-clock comp-run comp-common org-duration org-agenda
org-element org-persist org-id org-element-ast inline avl-tree generator
org-refile org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro
org-src sh-script smie treesit executable ob-comint org-pcomplete
org-list org-footnote org-faces org-entities noutline outline
ob-emacs-lisp ob-core ob-eval org-version org-cycle org-table ol
org-fold org-fold-core org-keys oc org-loaddefs thingatpt org-compat
org-macs autoinsert compile bookmark savehist crm minibuf-eldef mb-depth
ido tramp-cache time-stamp tramp-sh tramp rx trampver tramp-integration
files-x tramp-message tramp-compat xdg format-spec tramp-loaddefs
recentf tree-widget shell pcomplete comint ansi-osc ansi-color ring
easy-mmode display-fill-column-indicator hl-line time gnus-group
gnus-undo gnus-start gnus-dbus dbus gnus-cloud nnimap nnmail mail-source
utf7 nnoo parse-time iso8601 gnus-spec gnus-int gnus-range gnus-win gnus
nnheader range cus-edit pp cus-load wid-edit dictionary
external-completion dictionary-connection flyspell ispell shr pixel-fill
kinsoku url-file svg xml dom modus-vivendi-theme modus-themes mm-view
mml-smime smime gnutls dig smtpmail message sendmail yank-media puny
dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068
gnus-util text-property-search time-date mm-decode mm-bodies mm-encode
mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr
mailabbrev mail-utils gmm-utils mailheader epg-config help-mode dabbrev
find-func cal-menu calendar cal-loaddefs desktop frameset pcase
cape-autoloads consult-autoloads corfu-autoloads delight-autoloads
do-at-point-autoloads fsm-autoloads htmlize-autoloads lua-mode-autoloads
markdown-mode-autoloads modus-themes-autoloads package-lint-autoloads
php-mode-autoloads rainbow-mode-autoloads renpy-mode-autoloads
sly-autoloads totp-auth-autoloads base32-autoloads info
vertico-autoloads wgrep-autoloads which-key-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 icons 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 dynamic-setting system-font-setting
font-render-setting cairo x-toolkit xinput2 x multi-tty move-toolbar
make-network-process native-compile emacs)

Memory information:
((conses 16 2169516 335334) (symbols 48 55401 4)
 (strings 32 328878 16586) (string-bytes 1 8915868)
 (vectors 16 185749) (vector-slots 8 3018895 229298)
 (floats 8 942 4044) (intervals 56 161356 10553) (buffers 984 57))