Martin von Zweigbergk <martinvonz@google.com> [Fri, 14 Dec 2018 13:20:00 -0800] rev 40966
help: use "default: on" instead of "default: True"
"True" feels like a Python thing and not something that users should
see.
Differential Revision: https://phab.mercurial-scm.org/D5430