Danny Hooper <hooper@google.com> [Sat, 13 Oct 2018 01:55:40 -0700] rev 40511
beautifygraph: don't substitute anything for 'X' in rendered graphs
It looks like we never actually render graphs this way, although there's an
example in a comment next to the code that prevents it from being needed (see
graphmod.ascii()).
Differential Revision: https://phab.mercurial-scm.org/D5103