/usr/share/doc/python/SpecialBuilds.txt.gz is in python-dbg 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python/../python2.7/SpecialBuilds.txt.gz
/usr/share/doc/python/../python2.7/SpecialBuilds.txt.gz