Code review comment for lp:~vorlon/python-apt/lp.1069019

I don't think we should keep holding out for a test case, especially given bug 1278280 regarding the release-upgrader (which includes sourceslist.py from python-apt) crashing. With the errors associated with that bug we should have positive confirmation that fix is working rather quickly.

I'll go ahead and take care of merging and uploading this.