chore: fix formatting of a few Python files (#20778)

script/check-trailing-whitespace.py

@@ -49,7 +49,8 @@ def hasTrailingWhiteSpace(filepath, fix):
   for num, line in enumerate(lines):
     fixed_lines.append(line.rstrip() + '\n')
     if not fix and line != line.rstrip():
-      print("Trailing whitespace on line {} in file: {}".format(num + 1, filepath))
+      print("Trailing whitespace on line {} in file: {}".format(
+          num + 1, filepath))
       return True
   if fix:
     with open(filepath, 'w') as f:

script/lib/patches.py

@@ -8,7 +8,8 @@ def read_patch(patch_dir, patch_filename):
   """Read a patch from |patch_dir/filename| and amend the commit message with
   metadata about the patch file it came from."""
   ret = []
-  with codecs.open(os.path.join(patch_dir, patch_filename), encoding='utf-8') as f:
+  patch_path = os.path.join(patch_dir, patch_filename)
+  with codecs.open(patch_path, encoding='utf-8') as f:
     for l in f.readlines():
       if l.startswith('diff -'):
         ret.append('Patch-Filename: {}\n'.format(patch_filename))