org-element: Fix cache bug for orphaned elements
* lisp/org-element.el (org-element--cache-sync-requests): Remove a now
useless element from requests
(org-element--cache-submit-request): Apply change to sync request.
(org-element--cache-process-request): Apply change to sync requests.
Fix removal of orphaned elements, i.e., elements not affected by
a change, but with an ancestor that was.
* testing/lisp/test-org-element.el (test-org-element/cache): Add test.
Reported-by: Suvayu Ali <fatkasuvayu+linux@gmail.com>
<http://permalink.gmane.org/gmane.emacs.orgmode/98260>