Lint fixes

Author: alextwoods

packages/smithy-core/src/smithy_core/retries.py

@@ -247,9 +247,7 @@ def refresh_retry_token_for_retry(
             retry_delay = self.backoff_strategy.compute_next_backoff_delay(retry_count)
             return SimpleRetryToken(retry_count=retry_count, retry_delay=retry_delay)
         else:
-            raise SmithyRetryException(
-                f"Error is not retryable: {error_info}"
-            )
+            raise SmithyRetryException(f"Error is not retryable: {error_info}")
 
     def record_success(self, *, token: retries_interface.RetryToken) -> None:
         """Not used by this retry strategy."""