[BUG] "make check" reports a failure on test-org/insert-heading @ d5ee33f (this time with Emacs 29)

[Jens Schmidt]

Seems the insert-heading-issue is still struggling, this time during
a "make check" @ d5ee33fed8dd80d3f9f9811d86a73827fde80780 using Emacs 29:

Test test-org/insert-heading condition:
    (ert-test-failed
     ((should
       (equal "* 1\n** 1.1\n** 1.2\n*\n* 2"
              (org-test-with-temp-text "<point>* 1\n** 1.1\n** 1.2\n* 2" ... 
...)))
      :form
      (equal "* 1\n** 1.1\n** 1.2\n*\n* 2"
             #("* 1\n** 1.1\n** 1.2\n* \n* 2" 0 2
               (face org-level-1)
               2 3
               (face org-level-1)
               4 5
               (face org-level-2)
               5 7
               (face org-level-2)
               7 10
               (face org-level-2)
               11 12
               (face org-level-2)
               12 14
               (face org-level-2)
               14 17
               (face org-level-2)
               21 23
               (face org-level-1)
               23 24
               (face org-level-1)))
      :value nil :explanation
      (arrays-of-different-length 23 24 "* 1\n** 1.1\n** 1.2\n*\n* 2"
                                  #("* 1\n** 1.1\n** 1.2\n* \n* 2" 0 2
                                    (face org-level-1)
                                    2 3
                                    (face org-level-1)
                                    4 5
                                    (face org-level-2)
                                    5 7
                                    (face org-level-2)
                                    7 10
                                    (face org-level-2)
                                    11 12
                                    (face org-level-2)
                                    12 14
                                    (face org-level-2)
                                    14 17
                                    (face org-level-2)
                                    21 23
                                    (face org-level-1)
                                    23 24
                                    (face org-level-1))
                                  first-mismatch-at 19)))
   FAILED   998/1094  test-org/insert-heading (0.018306 sec) at 
../lisp/test-org.el:1845