v4.4.1
=========================== Jul 23, 2016 ------------ `tornado.web` ~~~~~~~~~~~~~ * Fixed a regression in Tornado 4.4 which caused URL regexes containing backslash escapes outside capturing groups to be rejected.
=========================== Jul 23, 2016 ------------ `tornado.web` ~~~~~~~~~~~~~ * Fixed a regression in Tornado 4.4 which caused URL regexes containing backslash escapes outside capturing groups to be rejected.