fix : return statement in `test_rod`, which caused tests to fail
A change made from a test lambda to a function (because of flake8 complaints)
caused a failed test. The failed test is attributed from the test function
having no return statement (as it haphazardly modified).
@@ -140,7 +140,7 @@ class TestExplicitStepperStateBehavior(LoadStates):
state, derivative = load_states
def func(x, y):
- x + 1.0 * y
+ return x + 1.0 * y
test_state = func(state, derivative)
