PyUpgrade 3.8 updates (#13289)

* PyUpgrade 3.8 updates

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

* Auto-format by https://ultralytics.com/actions

---------

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

classify/predict.py

@@ -147,7 +147,7 @@ def run(
             save_path = str(save_dir / p.name)  # im.jpg
             txt_path = str(save_dir / "labels" / p.stem) + ("" if dataset.mode == "image" else f"_{frame}")  # im.txt
 
-            s += "%gx%g " % im.shape[2:]  # print string
+            s += "{:g}x{:g} ".format(*im.shape[2:])  # print string
             annotator = Annotator(im0, example=str(names), pil=True)
 
             # Print results