/usr/lib/ghc-doc/hoogle/hoogle.txt is in libghc-hoogle-doc 4.2.23-3build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hoogle-doc/html/hoogle.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hoogle-doc/html/hoogle.txt