/usr/lib/ghc-doc/hoogle/test-framework-hunit.txt is in libghc-test-framework-hunit-doc 0.3.0.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-test-framework-hunit-doc/html/test-framework-hunit.txt