what's the right way to express an argument like sed's -iSUFFIX that takes an _optional_ string argument? right now i'm struggling to think of a similar option to copy & paste from... -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.landley.net/pipermail/toybox-landley.net/attachments/20181211/5e66b017/attachment.html>