/usr/lib/ghc-doc/hoogle/libghc-gitit-doc.txt is in libghc-gitit-doc 0.10.4-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gitit-doc/html/gitit.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gitit-doc/html/gitit.txt