/usr/lib/ghc-doc/hoogle/ncurses.txt is in libghc-ncurses-doc 0.2.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-ncurses-doc/html/ncurses.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-ncurses-doc/html/ncurses.txt