/usr/lib/ghc-doc/hoogle/libghc-pretty-show-doc.txt is in libghc-pretty-show-doc 1.6.15-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-pretty-show-doc/html/pretty-show.txt