* lisp/vc/smerge-mode.el (smerge-extend):
* lisp/vc/diff-mode.el (diff-beginning-of-file-and-junk):
* lisp/transient.el (transient--with-emergency-exit):
* lisp/textmodes/tex-mode.el (latex-forward-sexp):
* lisp/tar-mode.el (tar-mode):
* lisp/savehist.el (savehist--reload):
* lisp/progmodes/octave.el (inferior-octave-resync-dirs):
* lisp/progmodes/js.el (js--re-search-forward):
* lisp/plstore.el (plstore--decrypt):
* lisp/net/dbus.el (dbus-ignore-errors, dbus-register-signal)
(dbus-handle-event):
* lisp/mouse.el (mouse-drag-track, mouse-drag-region-rectangle):
* lisp/minibuffer.el (completion-pcm--find-all-completions):
* lisp/mail/rfc2231.el (rfc2231-parse-string):
* lisp/mail/rfc2047.el (rfc2047-encode-region):
* lisp/jit-lock.el (jit-lock-fontify-now):
* lisp/international/ja-dic-utl.el (skkdic-lookup-key):
* lisp/gnus/nnselect.el (nnselect-generate-artlist):
* lisp/gnus/mml-sec.el (mml-secure-epg-encrypt, mml-secure-epg-sign):
* lisp/gnus/mail-source.el (mail-source-fetch-pop)
(mail-source-check-pop):
* lisp/gnus/gnus-art.el (gnus-article-read-summary-keys):
* lisp/files.el (basic-save-buffer-2, files--ensure-directory)
(files--force, copy-directory):
* lisp/eshell/esh-io.el (eshell-output-object-to-target):
* lisp/epa.el (epa-decrypt-file, epa-verify-file, epa-sign-file)
(epa-encrypt-file, epa-decrypt-region, epa-verify-region)
(epa-sign-region, epa-encrypt-region, epa-delete-keys)
(epa-export-keys, epa-insert-keys):
* lisp/emacs-lisp/package.el (package--unless-error):
* lisp/emacs-lisp/multisession.el (multisession--read-file-value):
* lisp/emacs-lisp/lisp.el (up-list-default-function):
* lisp/desktop.el (desktop-kill):
* lisp/calendar/time-date.el (date-to-time):
* lisp/calendar/appt.el (appt-display-message):
* lisp/calc/calc.el (calc-do):
* lisp/bookmark.el (bookmark-handle-bookmark):
* src/fileio.c (report_file_errno):
* lisp/vc/vc.el (vc-checkout, vc-pull): Use `(signal err)` instead
of `(signal (car err) (cdr err))`.

With higher values of 'calc-string-maximum-character', rules
made up of glyphs of non-unit width can be the wrong length.
Calculate the number of characters in the rule based on the
display width, rounded up to the nearest integer.  Refines
feature introduced in bug#78528.
* lisp/calc/calccomp.el (math-comp-simplify-term): Calculate
rule width with a ratio of 'string-pixel-width's.

With higher values of 'calc-string-maximum-character' the
string length can differ from the displayed width.  Calculate
alignment offsets based on the the display width, rounded up to
the nearest integer.  Refines feature introduced in bug#78528.
* lisp/calc/calccomp.el (math-comp-width): Replace 'length' with
a ratio of 'string-pixel-width's.

Previously, if 'calc-string-maximum-character' wasn't a valid
character 'math-vector-is-string' would throw an error in the
comparison, leading to an incomplete display of the stack and a
cryptic error message.  Instead, have 'math-vector-is-string'
return nil, which effectively disables the display of strings.
Refines feature introduced in bug#78528.
* doc/misc/calc.texi (Customizing Calc): Update description of
behavior for invalid 'calc-string-maximum-character'.
* lisp/calc/calccomp.el (math-vector-is-string): Return nil when
'calc-string-maximum-character' doesn't represent a character.
* test/lisp/calc/calc-tests.el (calc-math-vector-is-string): Correct
and simplify tests.

998d45d5d10 ; * lisp/calc/calc-units.el: Better reference for CODATA ...
fae83f1eb8b ; Improve documentation of 'char-script-table'
3e489ed8049 ; * src/font.c (Flist_fonts): Doc fix.
4c292b6f703 ; vc-dir-clean-files: Improve docstring and message (bug#...
8a6b84dbcbc Fix doc string of 'display-buffer'

calc-help-prefix after calc-ext has been loaded.

* lisp/calc/calc.el (calc-create-buffer): Call 'calc-load-everything'.
(calc-always-load-extensions): Delete erroneous stanza.  (Bug#79157)

* doc/misc/calc.texi (Customizing Calc): Document the new option.
* etc/NEWS: Document the new option.
* lisp/calc/calc.el (calc-inhibit-startup-message): New option to
inhibit Calc’s startup message.
(calc): Respect the option in Calc’s startup code.
* test/lisp/calc/calc-tests.el (ert): Require ert-x for
'ert-with-message-capture'.
(calc-inhibit-startup-message): Test the new user option.