/usr/lib/ghc-doc/hoogle/GLFW.txt is in libghc-glfw-doc 0.5.1.0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-glfw-doc/html/GLFW.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-glfw-doc/html/GLFW.txt