Fix formatting issues flagged by ruff

Author: cusell-google

rest/python/server/routes/ucp_implementation.py

@@ -225,7 +225,11 @@ async def complete_checkout(
   )
 
   checkout_result = await checkout_service.complete_checkout(
-    checkout_id, payment_req, risk_signals, idempotency_key, checkout_complete=checkout_complete
+    checkout_id,
+    payment_req,
+    risk_signals,
+    idempotency_key,
+    checkout_complete=checkout_complete,
   )
   return checkout_result.model_dump(mode="json", by_alias=True)
 

rest/python/server/services/checkout_service.py

@@ -628,7 +628,9 @@ async def complete_checkout(
     combined_data = {
       "payment": payment.model_dump(mode="json"),
       "risk_signals": risk_signals,
-      "checkout_complete": checkout_complete.model_dump(mode="json") if checkout_complete else None,
+      "checkout_complete": checkout_complete.model_dump(mode="json")
+      if checkout_complete
+      else None,
     }
     request_hash = self._compute_hash(combined_data)