message: Fix serializeClass function signature.
diff: @@ -97,7 +97,7 @@ function serializeNamespace(node: ts.Namespace, depth: number): string {
  return out;
  }
  -function serializeClass(node: ts.Class|ts.Interface, depth: number): string {
  +function serializeClass(node: ts.Class, depth: number): string {
  let out = '';
  const i = indent(depth);
  if (node.description) {
  