/usr/share/doc/libsvn-ruby1.8/changelog.Debian.gz is in libsvn-ruby1.8 1.6.17dfsg-3ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsvn-ruby1.8/../libsvn1/changelog.Debian.gz
/usr/share/doc/libsvn-ruby1.8/../libsvn1/changelog.Debian.gz