Should Recommend python3-rpm

This bug was originally reported by Ross Burton (ross@debian.org) in Debian bug #949598:

Package: diffoscope
Version: 135
Severity: normal

diffoscope needs python3-rpm to compare RPM files, so it should recommend
python3-rpm along with the rest of the kitchen sink superstore. :)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information