[] for arrays rather than !()

[nojvek]

why does rison not use [] for arrays and instead uses !() ?, it's some what ambigious with () being an object.

[] is a legal character right?

[mqudsi]

They're not URL-safe. They're stripped/modified by some gateways.

See https://perishablepress.com/stop-using-unsafe-characters-in-urls/ and https://url.spec.whatwg.org/#url-path-segment-string