I don't exactly know the inner workings of the release upgrader but it seems that the sourceslist.py in the release upgrader is copied to the package at build time as it's just a symbolic link to sourceslist.py of python3-apt.
So as long as the fix gets into python-apt, it's also going to be in ubuntu-release-upgrader too...
I don't exactly know the inner workings of the release upgrader but it seems that the sourceslist.py in the release upgrader is copied to the package at build time as it's just a symbolic link to sourceslist.py of python3-apt.
So as long as the fix gets into python-apt, it's also going to be in ubuntu- release- upgrader too...