[predicates] allow multiple transition names in on_fire_transition (closes #3013720)
Also add a warning about the unimplemented from_state_name argument.
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s specific hooks and operations"""