Remove the underscore in filename

Author: williambdean

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
           - tests/model
           - tests/statespace/test_statespace.py
           - tests/statespace/test_kalman_filter.py
-          - tests/statespace --ignore tests/state_space/test_statespace.py --ignore tests/state_space/test_kalman_filter.py
+          - tests/statespace --ignore tests/statespace/test_statespace.py --ignore tests/statespace/test_kalman_filter.py
           - tests/distributions
           - tests --ignore tests/model --ignore tests/statespace --ignore tests/distributions
       fail-fast: false
@@ -67,7 +67,7 @@ jobs:
           - tests/model
           - tests/statespace/test_statespace.py
           - tests/statespace/test_kalman_filter.py
-          - tests/statespace --ignore tests/state_space/test_statespace.py --ignore tests/state_space/test_kalman_filter.py
+          - tests/statespace --ignore tests/statespace/test_statespace.py --ignore tests/statespace/test_kalman_filter.py
           - tests/distributions
           - tests --ignore tests/model --ignore tests/statespace --ignore tests/distributions
       fail-fast: false