Fix formatting issue

Author: kieransimkin

pycardano/backend/blockfrost.py

@@ -310,7 +310,7 @@ def evaluate_tx_cbor(self, cbor: Union[bytes, str]) -> Dict[str, ExecutionUnits]
             cbor = cbor.hex()
         with tempfile.NamedTemporaryFile(delete=False, mode="w") as f:
             f.write(cbor)
-        
+
         result = self.api.transaction_evaluate(f.name)
         os.remove(f.name)
         if not hasattr(result, "result"):