Matches https://github.com/ilyagr/pijul-clone as of now, might become out of sync

Fixing a test related to the tree/revtree tables

This disappeared in the recent refactoring of bidirectional inserts in tree/revtree

Created by  pmeunier  on December 9, 2020
IM6UFPOZHZTBMESRXGBALOAWJWUUDGLP2TVLSZ3RZPSJITKB3R7QC
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