misc: Run pre-commit run on all files in repo

The following command was run:

```
pre-commit run --all-files
```

This ensures all the files in the repository are formatted to pass our
checks.

Change-Id: Ia2fe3529a50ad925d1076a612d60a4280adc40de
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62572
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>

util/maint/list_changes.py

@@ -211,9 +211,13 @@ def _main():
 
     args = parser.parse_args()
 
-    incoming, outgoing, common, upstream_unknown, feature_unknown = list_changes(
-        args.upstream, args.feature, paths=args.paths
-    )
+    (
+        incoming,
+        outgoing,
+        common,
+        upstream_unknown,
+        feature_unknown,
+    ) = list_changes(args.upstream, args.feature, paths=args.paths)
 
     if incoming:
         print("Incoming changes:")