/usr/lib/ghc-doc/hoogle/hscurses.txt is in libghc-hscurses-doc 1.4.1.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hscurses-doc/html/hscurses.txt