/usr/share/doc/libghc-lambdabot-novelty-plugins-prof/changelog.Debian.gz is in libghc-lambdabot-novelty-plugins-prof 5.0.3-3build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libghc-lambdabot-novelty-plugins-prof/../libghc-lambdabot-novelty-plugins-dev/changelog.Debian.gz