[O] [PATCH] Reschedule "++" repeaters on same day if in future

[Don March]

If you have a task with the following timestamp:

    SCHEDULED: <2016-06-19 Sun 21:00 ++1w>

then marking it as DONE at [2016-06-27 at 07:00] should (debatably) result in

    SCHEDULED: <2016-06-26 Sun 21:00 ++1w>

but instead it becomes

    SCHEDULED: <2016-07-03 Sun 21:00 ++1w>

The attached patch changes the behavior to not skip a repeat occurrence that
would occur on the day that a task is completed, if there is a time in the
timestamp and it is after the current time. This is really useful, at least for
me, and also matches a literal reading of the docs. They say (regarding a "++1w"
repeater)

#+BEGIN_QUOTE
Marking this DONE will shift the date by at least one week, but also by as many
weeks as it takes to get this date into the future.
#+END_QUOTE

With a time before the repeater

    SCHEDULED: <2016-06-19 Sun 21:00 ++1w>

you seem to be saying that you don't start working on this task until Sunday
evening every week. If you get busy and don't mark it DONE until the next Sunday
morning, then you must be talking about the previous instance, not the repeat
occurrence which will become available later that day. So it makes sense to
increase the timestamp to later that day:

    SCHEDULED: <2016-06-26 Sun 21:00 ++1w>

For another example,  suppose you empty the kitchen trash every night:

    SCHEDULED: <2016-06-19 Sun 22:00 ++1d>

If you don't complete that occurrence for two days and then empty the trash on
Tuesday morning, you would still want to empty it that night:

    SCHEDULED: <2016-06-21 Tue 22:00 ++1d>

as opposed to skipping Tuesday night and repeating on Wednesday.

These examples seem useful to me. But this change could, in theory, lead to the
absurd situation of rescheduling a task for just a couple minutes after its
completion. But to me that seems the lesser of two evils; you just mark it DONE
again, versus the alternative of thinking that you'll be reminded of a task only
to forget all about it.

If the task is *already* scheduled for later today, this patch does not affect
the current behavior--the task will still be rescheduled on the next occurrence
on some future day.

0001-Reschedule-repeaters-on-same-day-if-in-future.patch
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