/usr/lib/ghc-doc/hoogle/Stream.txt is in libghc-stream-doc 0.4.6-4build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-stream-doc/html/Stream.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-stream-doc/html/Stream.txt