/usr/lib/ghc-doc/hoogle/libghc-abstract-deque-doc.txt is in libghc-abstract-deque-doc 0.3-7build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-abstract-deque-doc/html/abstract-deque.txt