/usr/lib/ghc-doc/hoogle/attoparsec-enumerator.txt is in libghc-attoparsec-enumerator-doc 0.3.1-3build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-attoparsec-enumerator-doc/html/attoparsec-enumerator.txt