/usr/share/doc/whiptail/changelog.Debian.gz is in whiptail 0.52.15-2ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/whiptail/../libnewt0.52/changelog.Debian.gz
/usr/share/doc/whiptail/../libnewt0.52/changelog.Debian.gz