Eg, #29 or #30 . Some thoughts:

• implement custom EmitFormatters:
  • block (the current emitter)
  • single-line flow
  • multi-line flow
  • semi-intelligent: use a general emitter, using heuristics such as counting columns and breaking and selecting block/flow styles as appropriate (eg, nested containers)
• implement per-node format flags? i.e., add flags forcing format selection?
• add type-based implicit tagging? e.g. implicit tag bools so that they show as "true" rather than "1"