Annotator: updated our Python tests.
Annotator: updated our Python tests.

nickerso/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,cellml/libcellml,hsorby/libcellml