v4.0.0-pre10

commit dda31d7b4dda01334295efbd9ea2a99baa7f99f0
Author: Greg Althaus <galthaus@austin.rr.com>
Date:   Sun Aug 4 22:25:27 2019 -0500

    Update to port split tests.

M   go.mod
M   go.sum

End of Note