This file is indexed.

/usr/lib/ghc-doc/hoogle/monads-tf.txt is in libghc-monads-tf-doc 0.1.0.1-2.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-monads-tf-doc/html/monads-tf.txt