/usr/share/doc/libqt4-ruby/changelog.Debian.gz is in libqt4-ruby 4:4.14.3-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqt4-ruby/../libqtruby4shared2/changelog.Debian.gz
/usr/share/doc/libqt4-ruby/../libqtruby4shared2/changelog.Debian.gz