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Merge pull request #1664 from zed-industries/slow-undo

Use a `SumTree` as the backing storage of `UndoMap`
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Antonio Scandurra committed
8fc12b0bf094ddbd942a3b04b39e816b051fd56f
Committed by GitHub <noreply@github.com> on 9/28/2022, 9:33:07 AM