attempting to fix a linter error

Author: jewettaijfc

tests/test_plugins/test_invdes.py

@@ -363,9 +363,9 @@ def test_continue_run_fns(use_emulated_run):  # noqa: F811
 
     num_steps_orig = len(result_orig.history["params"])
     num_steps_full = len(result_full.history["params"])
-    assert (
-        num_steps_full == num_steps_orig + num_steps_continue
-    ), "wrong number of elements in the combined run history."
+    assert num_steps_full == num_steps_orig + num_steps_continue, (
+        "wrong number of elements in the combined run history."
+    )
 
 
 def test_continue_run_from_file(use_emulated_run):  # noqa: F811
@@ -379,17 +379,17 @@ def test_continue_run_from_file(use_emulated_run):  # noqa: F811
     )
     num_steps_orig = len(result_orig.history["params"])
     num_steps_new = len(result_full.history["params"])
-    assert (
-        num_steps_new == num_steps_orig + num_steps_continue
-    ), "wrong number of elements in the combined run history."
+    assert num_steps_new == num_steps_orig + num_steps_continue, (
+        "wrong number of elements in the combined run history."
+    )
 
     # test the convenience function to load it from file
     result_full = optimizer.continue_run_from_history(num_steps=2, post_process_fn=post_process_fn)
     num_steps_orig = num_steps_new
     num_steps_new = len(result_full.history["params"])
-    assert (
-        num_steps_new == num_steps_orig + num_steps_continue
-    ), "wrong number of elements in the combined run history."
+    assert num_steps_new == num_steps_orig + num_steps_continue, (
+        "wrong number of elements in the combined run history."
+    )
 
 
 def test_result(
@@ -541,8 +541,9 @@ def test_parameter_spec(spec_class, spec_kwargs, expected_shape):
 
 
 def test_parameter_spec_with_inverse_design(
-    use_emulated_run, use_emulated_to_sim_data
-):  # noqa: F811
+    use_emulated_run,  # noqa: F811
+    use_emulated_to_sim_data,
+):
     """Test InitializationSpec with InverseDesign class."""
 
     metric = 2 * ModePower(monitor_name=MNT_NAME2, f=[FREQ0]) ** 2