/usr/lib/ghc-doc/hoogle/libghc-acid-state-doc.txt is in libghc-acid-state-doc 0.14.2-3build4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-acid-state-doc/html/acid-state.txt