fastannotate: use sysstr to deal with some attributes
We are now Python3 only and attribute are always unicode string. So no needs to
managed them using bytes.
from mercurial.i18n import _
from mercurial import changegroup, error, extensions
def abort(orig, *args, **kwargs):
raise error.Abort(_('this is an exercise'))
def uisetup(ui):
extensions.wrapfunction(changegroup, 'getbundler', abort)