/usr/lib/ghc-doc/hoogle/gsasl.txt is in libghc-gsasl-doc 0.3.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gsasl-doc/html/gsasl.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gsasl-doc/html/gsasl.txt