Multi-line, indented .dxn rendering — Dextrin.encode/2's pretty: true opt, mix dextrin.format's --mode pretty, and mix dextrin.decode's default output (a CLI decode is a human reading the result, so encode/2's own single-line default isn't the right default there). --mode condense needs no separate implementation at all: it's exactly what Dextrin.encode/2/Dextrin.Text.Printer already produce with pretty: false (the default).

The layout (Jan, 2026-10-20): the top-level collection always breaks, one entry per line, however short it is. A nested collection is written on one line, its entries single-space separated, when that line -- its indent and its key included -- fits the width (:width, 80); otherwise it breaks too, and what it holds is laid out again by the same rule.

A value has no comments, so this formatter has none to keep. To lay out a document and keep its comments, parse it as a Dextrin.Document and use Dextrin.Document.format/2, which lays a comment-free document out exactly as this module lays out its value.