ref: ce93c2af0b4aeb2c40a05f2b45c1397b7a2ced23
dir: /test/fmtalign.myr/
use std pkg = type msg = union `Tversion tversion ;; type tversion = struct tag : uint16 version : byte[:] ;; ;; const main = { var msg=`Tversion [.tag=45, .version="9P2000"] std.fmt("{}\n", msg) }