Running 3 tests (2023-02-18 15:33:34+0800, selector `(not (or (tag :expensive-test) (tag :unstable) (tag :nativecomp)))')
   passed  1/3  test-copyright-update (0.000399 sec)
Test test-correct-notice backtrace:
  signal(ert-test-failed (((should (equal (with-temp-buffer (dotimes (
  ert-fail(((should (equal (with-temp-buffer (dotimes (_ 2) (insert "C
  (if (unwind-protect (setq value-12 (apply fn-10 args-11)) (setq form
  (let (form-description-14) (if (unwind-protect (setq value-12 (apply
  (let ((value-12 'ert-form-evaluation-aborted-13)) (let (form-descrip
  (let* ((fn-10 #'equal) (args-11 (condition-case err (let ((signal-ho
  (let ((lexical-binding t)) (let* ((fn-10 #'equal) (args-11 (conditio
  (closure (t) nil (let ((lexical-binding t)) (let* ((fn-10 #'equal) (
  ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
  ert-run-test(#s(ert-test :name test-correct-notice :documentation ni
  ert-run-or-rerun-test(#s(ert--stats :selector (not (or ... ... ...))
  ert-run-tests((not (or (tag :expensive-test) (tag :unstable) (tag :n
  ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstable) (
  ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (tag :un
  eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-test) (
  command-line-1(("-L" ":." "-l" "ert" "-l" "lisp/emacs-lisp/copyright
  command-line()
  normal-top-level()
Test test-correct-notice condition:
    (ert-test-failed
     ((should
       (equal
	(with-temp-buffer ... ... ...)
	"Copyright 2021 FSF\nCopyright 2021, 2022 FSF\n"))
      :form
      (equal "Copyright 2021 FSF\nCopyright 2021, 2023 FSF\n" "Copyright 2021 FSF\nCopyright 2021, 2022 FSF\n")
      :value nil :explanation
      (array-elt 38
		 (different-atoms
		  (51 "#x33" "?3")
		  (50 "#x32" "?2")))))
   FAILED  2/3  test-correct-notice (0.000267 sec)
Test test-end-chop backtrace:
  signal(ert-test-failed (((should (equal (with-temp-buffer (let (...)
  ert-fail(((should (equal (with-temp-buffer (let ((copyright-query ni
  (if (unwind-protect (setq value-7 (apply fn-5 args-6)) (setq form-de
  (let (form-description-9) (if (unwind-protect (setq value-7 (apply f
  (let ((value-7 'ert-form-evaluation-aborted-8)) (let (form-descripti
  (let* ((fn-5 #'equal) (args-6 (condition-case err (let ((signal-hook
  (let ((lexical-binding t)) (let* ((fn-5 #'equal) (args-6 (condition-
  (closure (t) nil (let ((lexical-binding t)) (let* ((fn-5 #'equal) (a
  ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
  ert-run-test(#s(ert-test :name test-end-chop :documentation nil :bod
  ert-run-or-rerun-test(#s(ert--stats :selector (not ...) :tests [... 
  ert-run-tests((not (or (tag :expensive-test) (tag :unstable) (tag :n
  ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstable) (
  ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (tag :un
  eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-test) (
  command-line-1(("-L" ":." "-l" "ert" "-l" "lisp/emacs-lisp/copyright
  command-line()
  normal-top-level()
Test test-end-chop condition:
    (ert-test-failed
     ((should
       (equal
	(with-temp-buffer ...)
	"Copyright 2006, 2007, 2008, 2022 Foo Bar\n\n"))
      :form
      (equal "Copyright 2006, 2007, 2008, 2023 Foo Bar\n\n" "Copyright 2006, 2007, 2008, 2022 Foo Bar\n\n")
      :value nil :explanation
      (array-elt 31
		 (different-atoms
		  (51 "#x33" "?3")
		  (50 "#x32" "?2")))))
   FAILED  3/3  test-end-chop (0.000203 sec)

Ran 3 tests, 1 results as expected, 2 unexpected (2023-02-18 15:33:34+0800, 0.165198 sec)

2 unexpected results:
   FAILED  test-correct-notice
   FAILED  test-end-chop