Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 15 Jan 2020 15:48:28 +0100] rev 44315
nodemap: use an explicit "Block" object in the reference implementation
This will help us to introduce some test around the data currently written on
disk.
Differential Revision: https://phab.mercurial-scm.org/D7842