sync: fix sync::broadcast::Sender<T>::closed() doctest #7090
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The test's previous iteration could sometimes flake since we didn't await the completion of the first task. Since the tasks only existed to `move` the relevant `rx`'s in, to force a drop, we can omit them entirely and drop the `rx`s via `drop()`. This prevents any scheduling-related flakes.
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The test's previous iteration could sometimes flake since we didn't await the completion of the first task. Since the tasks only existed to
movethe relevantrx's in, to force a drop, we can omit them entirely and drop therxs viadrop(). This prevents any scheduling-related flakes.Motivation
Solution