Hey, I've implemented it for the ripl multi_line plugin <https://github.com/janlelis/ripl-multi_line/>; (version 0.3.0).

You can change the behavior with the Ripl.config[:multi_line_history] option. Possible values: * :compact - transform the last statement into a ; separated one-liner * :block - just join the last multi-line statement to one block ("\n") * :blank - do nothing