Comment 4 for bug 2001568

It looks like Debian independently fixed the running_escape_regexp line in January (in 2.9.1+nmu3 [1]). The d/t/control fix isn't *strictly* necessary to fix this and is more a matter of fixing semantics -- but I'll try and forward that change if I can figure out where to submit a PR (doesn't appear u-u is in salsa, and the GH Vcs-Git repo is way behind where it's meant to be).

[1]: https://tracker.debian.org/news/1405664/accepted-unattended-upgrades-291nmu3-source-into-unstable/