[js] add a selector string escaping function
will help use id strings in jquery selector expressions, e.g:
"foo.[subject]:42" -> "foo\.\[subject\]\:42"
Related to #3154531.
# -*- 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 schema"""