/usr/lib/ghc-doc/hoogle/glade.txt is in libghc-glade-doc 0.12.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-glade-doc/html/glade.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-glade-doc/html/glade.txt