/usr/lib/ghc-doc/hoogle/libghc-dav-doc.txt is in libghc-dav-doc 1.3.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-dav-doc/html/DAV.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-dav-doc/html/DAV.txt