Investigate task.take()

[pictographer]

    pub async fn finalize(&mut self) {
        // Stop waiting for an interrupt.
        self.handle.close();

        // TODO This is here to mimic the example in the documentation, but
        // it doesn't seem to make any difference whether or not it's here. Why?
        // https://docs.rs/signal-hook-async-std/latest/signal_hook_async_std/
        if let Some(task) = &mut self.task.take() {
            task.await
        }
    }