/usr/lib/ghc-doc/hoogle/safe.txt is in libghc-safe-doc 0.3.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-safe-doc/html/safe.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-safe-doc/html/safe.txt