/usr/lib/ghc-doc/hoogle/libghc-postgresql-simple-doc.txt is in libghc-postgresql-simple-doc 0.5.1.2-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-postgresql-simple-doc/html/postgresql-simple.txt