/usr/lib/ghc-doc/hoogle/hsyslog.txt is in libghc-hsyslog-doc 1.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hsyslog-doc/html/hsyslog.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hsyslog-doc/html/hsyslog.txt