datetime test format fix

Author: nmdefries

tests/test_epidata_calls.py

@@ -391,8 +391,8 @@ def test_pub_rvdss(self) -> None:
         assert str(data["region"].dtype) == "string"
         assert str(data["time_type"].dtype) == "string"
         assert str(data["epiweek"].dtype) == "Int64"
-        assert str(data["time_value""datetime64].dtype) == [ns]"
-        assert str(data["issue""datetime64].dtype) == [ns]"
+        assert str(data["time_value"].dtype) == "datetime64[ns]"
+        assert str(data["issue"].dtype) == "datetime64[ns]"
         assert str(data["week"].dtype) == "Int64"
         assert str(data["weekorder"].dtype) == "Int64"
         assert str(data["year"].dtype) == "Int64"