another attempt to fix doctests
another attempt to fix doctests

Former-commit-id: 298afe06f4607a71ea146fe8bebf1542dfec7ec2 [formerly 92f2275af25436207e37887fb5ac04f491a8df33]
Former-commit-id: 3a999b01acaabea14a5c1a35061169e6c19421d1
Former-commit-id: 8dda140fe9962e4485e0c0b6ff3b619ac95b56c1 [formerly 19d8503b7385b719e55c1fab94dcb9dc83ac0003]
Former-commit-id: 003f625cc62f6423303a11a672fed1043f94f06b
hnunner/PyOpenWorm,kaustubhcs/PyOpenWorm,openworm/PyOpenWorm,gsarma/PyOpenWorm,travs/PyOpenWorm,gsarma/PyOpenWorm,openworm/PyOpenWorm