I developed Parendown over the last couple of days as my first foray into Racket #lang extension.
This is a syntactic feature I've had in the Era languages for a long time, and it has such a drastic effect on the language's appearance that I always feel like I need to go out of my way to explain it. It's just a simple s-expression sugar inspired by Arc's a:b ssyntax, but it's so handy.
