/usr/lib/ghc-doc/hoogle/libghc-gluraw-doc.txt is in libghc-gluraw-doc 2.0.0.2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gluraw-doc/html/GLURaw.txt