- logger.debug("SecureXMLRPCServer.__init__, server_address=%s, "
- "cert_file=%s, key_file=%s" % (server_address, cert_file, key_file))
+ logger.debug(
+ f"SecureXMLRPCServer.__init__, server_address={server_address}, "
+ f"cert_file={cert_file}, key_file={key_file}")