Thanks for working on this but this doesn't actually work as there is no ubuntu-release-upgrader binary package.
$ apt-cache search ubuntu-release-upgrader ubuntu-release-upgrader-core - manage release upgrades ubuntu-release-upgrader-gtk - manage release upgrades ubuntu-release-upgrader-qt - manage release upgrades
So we aren't matching anything with the blacklist entry and end up allowing ubuntu-release-upgrader-core to be removed which isn't the desired outcome.
Thanks for working on this but this doesn't actually work as there is no ubuntu- release- upgrader binary package.
$ apt-cache search ubuntu- release- upgrader release- upgrader- core - manage release upgrades release- upgrader- gtk - manage release upgrades release- upgrader- qt - manage release upgrades
ubuntu-
ubuntu-
ubuntu-
So we aren't matching anything with the blacklist entry and end up allowing ubuntu- release- upgrader- core to be removed which isn't the desired outcome.