/usr/share/doc/smlnj/changelog.Debian.gz is in smlnj 110.79-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/smlnj/../smlnj-runtime/changelog.Debian.gz
/usr/share/doc/smlnj/../smlnj-runtime/changelog.Debian.gz