tests: don't use "status" operand of dd in test-censor.t (issue6858)
Some implementations don't have this operand, let's just direct stderr into
/dev/null, that's pretty cross-platform.
Also specify bs=512 (the default for me), because the default might be
different on different systems. Other uses of dd in the tests do specify it, so
this is more consistent.
# __init__.py - Startup and module loading logic for Mercurial.
#
# Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
# Allow 'from mercurial import demandimport' to keep working.
import hgdemandimport
demandimport = hgdemandimport