/usr/lib/ghc-doc/hoogle/haskeline.txt is in libghc-haskeline-doc 0.7.0.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-haskeline-doc/html/haskeline.txt