org-capture: Fix aborting after inserting text at end of buffer
* lisp/org-capture.el (org-capture-mark-kill-region): Set end marker
insertion type so that it advances when inserting text at the end of
the capture buffer.
* testing/lisp/test-org-capture.el (test-org-capture/insert-at-end-abort):
Add test case.
Inserting text at the end of the capture buffer does not advance the
end kill marker. This causes the narrowing region and the kill
markers to get out of sync, which prevents 'org-capture-finalize' from
correctly cleaning the target buffer when aborting the capture.
Setting the kill end marker insertion type fixes this.
TINYCHANGE