Fix for python 3 doctest.
Fix for python 3 doctest.

Applemann/hypatia,Applemann/hypatia,brechin/hypatia,brechin/hypatia,hypatia-software-org/hypatia-engine,hypatia-software-org/hypatia-engine,lillian-lemmer/hypatia,lillian-lemmer/hypatia