Convert formatting to use ruff instead of yapf + isort (#26247)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

tools/check_spdx_header.py

@@ -7,6 +7,7 @@ from enum import Enum
 
 class SPDXStatus(Enum):
     """SPDX header status enumeration"""
+
     EMPTY = "empty"  # empty __init__.py
     COMPLETE = "complete"
     MISSING_LICENSE = "missing_license"  # Only has copyright line
@@ -16,7 +17,8 @@ class SPDXStatus(Enum):
 
 FULL_SPDX_HEADER = (
     "# SPDX-License-Identifier: Apache-2.0\n"
-    "# SPDX-FileCopyrightText: Copyright contributors to the vLLM project")
+    "# SPDX-FileCopyrightText: Copyright contributors to the vLLM project"
+)
 
 LICENSE_LINE = "# SPDX-License-Identifier: Apache-2.0"
 COPYRIGHT_LINE = "# SPDX-FileCopyrightText: Copyright contributors to the vLLM project"  # noqa: E501
@@ -123,8 +125,9 @@ def main():
             continue
 
     # Collect all files that need fixing
-    all_files_to_fix = (files_missing_both + files_missing_copyright +
-                        files_missing_license)
+    all_files_to_fix = (
+        files_missing_both + files_missing_copyright + files_missing_license
+    )
     if all_files_to_fix:
         print("The following files are missing the SPDX header:")
         if files_missing_both: