Ihor Radchenko <yantar92@posteo.net> writes:

> Would it make sense to throw a warning instead of silently skipping ~++~
> and ~.+~ repeaters?
>
> I think it would make sense to link to this variable in the
> `org-icalendar-use-scheduled' docstring and possibly in the manual.

Thanks, I agree.  I've updated the patch to add a warning for the
nonstandard repeaters (plus a unit test), and also added links to
`org-icalendar-todo-unscheduled-start' in the manual and
`org-icalendar-use-scheduled' docstring.

For convenience I attach these as separate patches here.  If it looks
OK I will squash with the prior patch before applying to main.