ref: 2c4ac1330705a7358cd9946ac5af3308ba1cef23
dir: /lib/bio/test/bio-unitwr.myr/
use std use bio const main = { var f match bio.create("tmpout/test-unitwr", bio.Wr, 0o644) | `std.Ok bio: f = bio | `std.Fail m: std.fatal("Unable to open data file: {}\n", m) ;; bio.putb(f, 42) bio.putc(f, 'ה') bio.putb(f, 0xa) bio.close(f); }