Line 229 of DistUpgradeViewNonInteractive.py was changed due to bug https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1538880.
Line 229 of DistUpgradeView NonInteractive. py was changed due to bug https:/ /bugs.launchpad .net/ubuntu/ +source/ ubuntu- release- upgrader/ +bug/1538880.