another attempt to fix doctests
another attempt to fix doctests

Former-commit-id: 92f2275af25436207e37887fb5ac04f491a8df33
gsarma/PyOpenWorm,kaustubhcs/PyOpenWorm,openworm/PyOpenWorm,hnunner/PyOpenWorm,travs/PyOpenWorm,gsarma/PyOpenWorm,openworm/PyOpenWorm