src/cli/util.js/createOptionUsageType
function createOptionUsageType(option) {
  switch (option.type) {
    case "boolean":
      return null;
    case "choice":
      return `<${option.choices
        .filter(choice => !choice.deprecated)
        .map(choice => choice.value)
        .join("|")}>`;
    default:
      return `<${option.type}>`;
  }
}