Standardize headers and docstrings (#4417)

* Implement new headers

* Reformat 1

* Reformat 2

* Reformat 3 - math

* Reformat 4 - yaml

utils/augmentations.py

@@ -1,10 +1,13 @@
-# YOLOv5 image augmentation functions
+# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
+"""
+Image augmentation functions
+"""
 
 import logging
+import math
 import random
 
 import cv2
-import math
 import numpy as np
 
 from utils.general import colorstr, segment2box, resample_segments, check_version