python-pip: pip incorrectly handled unicode separators in git references Upstream PR: https://github.com/pypa/pip/pull/9827 Upstream commit: https://github.com/pypa/pip/commit/e46bdda9711392fec0c45c1175bae6db847cb30b CREATE(Triage):(User=admin) CVE-2021-3572 (https://nvd.nist.gov/vuln/detail/CVE-2021-3572)