/usr/share/doc/libpaper-dev/changelog.gz is in libpaper-dev 1.1.24+nmu2ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpaper-dev/../libpaper1/changelog.gz
/usr/share/doc/libpaper-dev/../libpaper1/changelog.gz