[NFC] python_format: Add some useful forwarded options

Author: AnthonyLatsis

utils/python_format.py

@@ -112,7 +112,7 @@ def parse_args():
     parser.add_argument(
         "--check",
         action="store_true",
-        help="Don't format the file, just return the status.",
+        help="Don't write the files back, just return the status.",
     )
 
     parser.add_argument(
@@ -122,6 +122,19 @@ def parse_args():
         help="Emit messages to stderr about files that were not changed.",
     )
 
+    parser.add_argument(
+        "--diff",
+        action="store_true",
+        help="Don't write the files back, just output a diff for each file on stdout.",
+    )
+
+    parser.add_argument(
+        "-S",
+        "--skip-string-normalization",
+        action="store_true",
+        help="Don't normalize string quotes or prefixes.",
+    )
+
     return parser.parse_args()
 
 
@@ -144,6 +157,10 @@ def main():
         command.append("--check")
     if args.verbose:
         command.append("--verbose")
+    if args.diff:
+        command.append("--diff")
+    if args.skip_string_normalization:
+        command.append("--skip-string-normalization")
 
     requested_paths = [path.resolve() for path in args.paths]