`'appending parent:\n%s\ncontent:\n%s' % (parent, content)`, works, but: `'appending parent:\n%s\ncontent:\n%s' % list((parent, content))` fails with a TypeError. Some of googleads built in LogFilters (_SudsMXCoreFilter and _SudsMXLiteralFilter) convert the log record.args from tuple to list resulting in errors.