/usr/lib/ghc-doc/hoogle/libghc-hgettext-doc.txt is in libghc-hgettext-doc 0.1.30-14.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hgettext-doc/html/hgettext.txt