This site describes solve-engine as it is on main: 2.43.0, which npm does not have yet. npm installs 2.40.0, so a page may show an answer that version does not give yet.
DEFAULT_FORMATTING_SETTINGS
const DEFAULT_FORMATTING_SETTINGS: FormattingSettings;Defined in: packages/engine/src/format/FormattingSettings.ts:133
Formatting used when a host supplies none.