/usr/lib/ghc-doc/hoogle/libghc-quickcheck-safe-doc.txt is in libghc-quickcheck-safe-doc 0.1.0.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-quickcheck-safe-doc/html/QuickCheck-safe.txt