function command( repl ) {
	return onCommand;

	/**
	* Resets a REPL's local context.
	*
	* @private
	*/
	function onCommand() {
		repl.reset();
	}
}
Returns a callback to be invoked upon calling the `reset` command.

@private
@param {REPL} repl - REPL instance
@returns {Function} callback