/usr/share/doc/python-imobiledevice/changelog.Debian.gz is in python-imobiledevice 1.2.1~git20171128.5a854327+dfsg-0.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-imobiledevice/../libimobiledevice6/changelog.Debian.gz