Boris Feld <boris.feld@octobus.net> [Wed, 16 Aug 2017 10:26:26 +0200] rev 33856
obsmarker: precnode was renamed into prednode
Update all calls to formatter.write first arguments to remove references to
precnode and use prednode consistently everywhere.
Differential Revision: https://phab.mercurial-scm.org/D414