Merge from origin/emacs-28

1a1b206a8b Adapt the recent 'num_processors' change to MS-Windows
7cb4637923 Minor fix to clarify a sentence in emacs-lisp-intro
ab60144ea3 ; Pacify recent shorthand unused lexarg warnings.
e9df86004f Make tty-run-terminal-initialization load the .elc file (i...
07edc28bdb Fix ert errors when there's a test that binds `debug-on-er...
96278de8ac New function num-processors
575e626105 Add symbol property 'save-some-buffers-function' (bug#46374)
a3e10af95c Keep reading when typed RET in read-char-from-minibuffer a...
013e3be832 * lisp/userlock.el (ask-user-about-supersession-threat): A...
ae61d7a57d Fix point positioning on mouse clicks with non-zero line-h...
4c7e74c386 Complete shorthands to longhands for symbol-completing tables
c2513c5d0d Add new failing test for bug#51089
1d1e96377c ; * lisp/emacs-lisp/shortdoc.el: Fix typo.
6bf29072e9 Avoid mapping file names through 'substring'
bcce93f04c Update to Org 9.5-46-gb71474
5d408f1a24 Expanded testing of MH-E with multiple MH variants
b497add971 Fix Seccomp filter for newer GNU/Linux systems (Bug#51073).
75d9fbec88 Tramp code cleanup

# Conflicts:
#	etc/NEWS
#	test/lisp/progmodes/elisp-mode-tests.el

lisp/emacs-lisp/ert.el

@@ -781,6 +781,10 @@ This mainly sets up debugger-related bindings."
                           (ert--run-test-debugger test-execution-info
                                                   args)))
               (debug-on-error t)
+              ;; Don't infloop if the error being called is erroring
+              ;; out, and we have `debug-on-error' bound to nil inside
+              ;; the test.
+              (backtrace-on-error-noninteractive nil)
               (debug-on-quit t)
               ;; FIXME: Do we need to store the old binding of this
               ;; and consider it in `ert--run-test-debugger'?