pub fn shift_repeating_timestamp(
value: &str,
today: NaiveDate,
) -> Option<String>Expand description
The timestamp after one repeat, as Org shifts it when a repeating task
is marked done (manual 8.3.3): + moves one interval on from the date
it holds, ++ moves by intervals until the date is past today, .+
moves one interval on from today. The day name follows the date;
time, repeater and warning stay as written. A timestamp without a
repeater, or a range, is None.