* lisp/org-fold-core.el (org-fold-core-folded-p): Allow list of fold
types to be passed as argument.
* lisp/org-fold.el (org-fold-check-before-invisible-edit--overlays):
(org-fold-check-before-invisible-edit--text-properties): Make
overlay/text-property behaviour consistent. Do not handle edits
inside folded links. Fix inconsistencies.
* testing/lisp/test-org-fold.el:
* testing/lisp/test-org.el: Move folding-related tests to new test
file.
* testing/lisp/test-org-fold.el:
(test-org-fold/org-catch-invisible-edits): New test.
See https://orgmode.org/list/m2o809q170.fsf@gmail.com
