Bug#970140: gramps: Python3.8 SyntaxWarning: "is not" with a literal.

Followed up upstream: https://gramps-project.org/bugs/view.php?id=11641 Jean-Marc https://6jf.be/keys/ED863AD1.txt https://6jf.be/keys/ED0B8558.txt pgpB6jufWn8Ea.pgp Description: PGP signature

Bug#970140: gramps: Python3.8 SyntaxWarning: "is not" with a literal. in exportvcalendar.py:205 during installation

Package: gramps Version: 5.1.3-1 Severity: normal Dear Maintainer, Since Python3.8, "is" and "is not" checks produce SyntaxWarning when used with certains type of literals. See release notes: https://docs.python.org/3.8/whatsnew/3.8.html#changes-in-python-behavior "The compiler now produces a