$ mix dextrin.decode data.dxnb
$ mix dextrin.decode data.dxnb --out data.dxn
Prints through Dextrin.Text.Formatter's pretty (multi-line) mode by
default — a CLI decode is a human reading the result, so the
encoder's own single-line default (correct for Dextrin.encode/2's
own API) isn't the right default here.