whitespace linter fix

Author: jonathan343

packages/smithy-aws-core/tests/unit/credentials_resolvers/test_imds.py

@@ -111,4 +111,5 @@ async def test_token_cache_get_token():
     await token_cache.get_token()
     token_cache._refresh.assert_awaited()
 
-# TODO: Add tests for EC2Metadata and IMDSCredentialsResolver
+
+# TODO: Add tests for EC2Metadata and IMDSCredentialsResolver