Nevermind, it's not html5lib, it's libpython3.5-stdlib, and the issue is the new undocumented "convert_charrefs" argument to _init__.
** Package changed: html5lib (Ubuntu) => python3.5 (Ubuntu) ** Summary changed: - html entities are incorrectly preprocessed + HTMLParser html entities preprocessing is undocumented -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1592628 Title: HTMLParser html entities preprocessing is undocumented To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python3.5/+bug/1592628/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs