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

toolboxes/Plotting/plot_source_wave.py

@@ -22,6 +22,7 @@ from pathlib import Path
 
 import matplotlib.pyplot as plt
 import numpy as np
+
 from gprMax.utilities.utilities import fft_power, round_value
 from gprMax.waveforms import Waveform