/usr/lib/ghc-doc/hoogle/libghc-bytestring-progress-doc.txt is in libghc-bytestring-progress-doc 1.0.5-4build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-bytestring-progress-doc/html/bytestring-progress.txt