cmdutil: say that `graft --stop` stops the graft instead of aborting
I am going to add a --abort flag to graft soon, so we make sure we differentiate
between the what --stop flag does and what --abort does and don't use the words
interchangeably.
Differential Revision: https://phab.mercurial-scm.org/D3735
[paths]
/ = /var/hg/repos/*
[web]
allow_push = *
push_ssl = False