pub fn retarget(
text: &str,
old: &str,
new: &str,
became_event: bool,
now: &Zoned,
) -> Option<String>Expand description
Another task’s text once the thing it names by old became new, an
appointment (became_event) or a task: its links to it named again; its
waits and ties of steps on it dropped when it became an appointment,
which nothing waits for. None when it names nothing of it.