Break after a container when we're emitting a container.

Things like this:

    aaaaaa = (
        bbbbbbbb(cccccccc, dddddddddd), eeeeeeee(fffffff, ggggggg)
    )

tend to look much gooder like this:

    aaaaaa = (
        bbbbbbbb(cccccccc, dddddddddd),
        eeeeeeee(fffffff, ggggggg)
    )