Formatting: Format all python code with black.

This CL is probably not what you're looking for, it's only
automated formatting. Ignore it with
`git blame --ignore-rev <revision>` for this commit.

BUG=b:233893248
TEST=CQ

Change-Id: I66591d7a738d241aed3290138c0f68065ab10a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3879174
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/scripts/cros_generate_stateful_update_payload.py b/scripts/cros_generate_stateful_update_payload.py
index 14119da..93d3fd2 100644
--- a/scripts/cros_generate_stateful_update_payload.py
+++ b/scripts/cros_generate_stateful_update_payload.py
@@ -9,21 +9,31 @@
 
 
 def ParseArguments(argv):
-  """Returns a namespace for the CLI arguments."""
-  parser = commandline.ArgumentParser(description=__doc__)
-  parser.add_argument('-i', '--image_path', type='path', required=True,
-                      help='The image to generate the stateful update for.')
-  parser.add_argument('-o', '--output_dir', type='path', required=True,
-                      help='The path to the directory to output the stateful'
-                           'update file.')
-  opts = parser.parse_args(argv)
-  opts.Freeze()
+    """Returns a namespace for the CLI arguments."""
+    parser = commandline.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "-i",
+        "--image_path",
+        type="path",
+        required=True,
+        help="The image to generate the stateful update for.",
+    )
+    parser.add_argument(
+        "-o",
+        "--output_dir",
+        type="path",
+        required=True,
+        help="The path to the directory to output the stateful" "update file.",
+    )
+    opts = parser.parse_args(argv)
+    opts.Freeze()
 
-  return opts
+    return opts
 
 
 def main(argv):
-  opts = ParseArguments(argv)
+    opts = ParseArguments(argv)
 
-  paygen_stateful_payload_lib.GenerateStatefulPayload(opts.image_path,
-                                                      opts.output_dir)
+    paygen_stateful_payload_lib.GenerateStatefulPayload(
+        opts.image_path, opts.output_dir
+    )