* lisp/ol.el (org-link-make-regexps): Update regexp to forbid any
un-escaped square bracket in the URI.
(org-link-escape):
(org-link-unescape):
* testing/lisp/test-ol.el (test-ol/escape):
(test-ol/unescape):
(test-ol/store-link):
* testing/lisp/test-org.el (test-org/custom-id):
(test-org/fuzzy-links):
* testing/lisp/test-ox.el (test-org-export/resolve-fuzzy-link): Adapt
to new syntax.
* doc/org-manual.org (Link Format): Update documentation.
The new syntax allowed un-escaped opening square brackets in the URI
part of bracket links. Unfortunately, it led to bug as described here:
<https://lists.gnu.org/archive/html/emacs-orgmode/2019-12/msg00312.html>
Now, we require to escape every square bracket in the URI.