Blackened causal_testing again

Author: jmafoster1

causal_testing/json_front/json_class.py

@@ -176,9 +176,7 @@ def _execute_test_case(self, causal_test_case: CausalTestCase, estimator: Estima
 
         result_string = str()
         if causal_test_result.ci_low() and causal_test_result.ci_high():
-            result_string = (
-                f"{causal_test_result.ci_low()} < {causal_test_result.test_value.value} <  {causal_test_result.ci_high()}"
-            )
+            result_string = f"{causal_test_result.ci_low()} < {causal_test_result.test_value.value} <  {causal_test_result.ci_high()}"
         else:
             result_string = causal_test_result.test_value.value
         if f_flag: