/usr/lib/ghc-doc/hoogle/libghc-iproute-doc.txt is in libghc-iproute-doc 1.7.1-2build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-iproute-doc/html/iproute.txt