Quoting Simon McVittie <smcv@debian.org>:
In python-mpd-doc and python-dbus-doc, I installed the real documentation files in /u/s/d/python-*-doc, but placed symlinks to them in both /u/s/d/python-* and /u/s/d/python3-*. Perhaps that's a reasonable way to achieve the spirit of the Policy §12.3 recommendation while not privileging one of Python 2, Python 3, PyPy, etc. over the others?
Nice idea, I'll do the same. Thanks!