Formatting: Format all python code with black.

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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/gsutil.py b/scripts/gsutil.py
index 2a69287..82fd634 100644
--- a/scripts/gsutil.py
+++ b/scripts/gsutil.py
@@ -14,10 +14,11 @@
 
 
 def main(argv):
-  ctx = gs.GSContext(retries=0)
-  try:
-    return ctx.DoCommand(
-        argv, print_cmd=False, stderr=None, check=False).returncode
-  except KeyboardInterrupt:
-    logging.debug('Aborted due to keyboard interrupt.')
-    return 128 + signal.SIGINT
+    ctx = gs.GSContext(retries=0)
+    try:
+        return ctx.DoCommand(
+            argv, print_cmd=False, stderr=None, check=False
+        ).returncode
+    except KeyboardInterrupt:
+        logging.debug("Aborted due to keyboard interrupt.")
+        return 128 + signal.SIGINT