Fix linter

Author: alextwoods

packages/smithy-aws-core/src/smithy_aws_core/identity.py

@@ -62,4 +62,5 @@ def session_token(self) -> str | None:
     def account_id(self) -> str | None:
         return self._account_id
 
+
 AWSCredentialsResolver = IdentityResolver[AWSCredentialsIdentity, IdentityProperties]

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

@@ -66,4 +66,3 @@ async def test_all_values(monkeypatch):  # type: ignore
     assert credentials.secret_access_key == "secret"
     assert credentials.session_token == "session"
     assert credentials.account_id == "123456789012"
-