* lisp/org.el (org-open-at-point): Rewrite function using Element
parser.
(org-link-types): Add "help" type.
* testing/lisp/test-org-open-at-point.el: Remove file. Two tests are
not supported anymore (namely bracket-link-before and
plain-link-before) and the other tests are wrong (mixing id and
custom-id links).
* testing/examples/open-at-point.org: Remove file.
* testing/lisp/test-org.el (test-org/custom-id): Add test.
Unlike to the previous implementation, this one will only open links
under point or just before point, not links on the same line but
before point.
fc9ce86cfc