[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

pre_commit_hooks/check_json.py

@@ -18,6 +18,7 @@ def raise_duplicate_keys(ordered_pairs: List[Tuple[Hashable, Any]]) -> Dict:
             d[key] = val
     return d
 
+
 def main(argv: Optional[Sequence[str]] = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', help='Filenames to check.')