/usr/lib/ghc-doc/hoogle/optparse-applicative.txt is in libghc-optparse-applicative-doc 0.7.0.2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-optparse-applicative-doc/html/optparse-applicative.txt