updated the pre-commit-config.yaml file by adding the isort hook.

testing/models_pmls/pml_3D_pec_plate/pml_3D_pec_plate.py

@@ -1,8 +1,9 @@
 from pathlib import Path
 
-import gprMax
 import numpy as np
 
+import gprMax
+
 # File path for output
 fn = Path(__file__)
 parts = fn.parts

testing/models_pmls/pml_3D_pec_plate/pml_3D_pec_plate_ref.py

@@ -1,8 +1,9 @@
 from pathlib import Path
 
-import gprMax
 import numpy as np
 
+import gprMax
+
 # File path for output
 fn = Path(__file__)
 parts = fn.parts