unexpected ripper output when subscribing to events

stuff.rb

file = <<~FILE
  # typed: strong

  # == Schema Information
  #
  # Table name: users
  #
  #  id                     :bigint           not null, primary key
  #
  module Admin
    class User < ApplicationRecord
    end  
  end
FILE

=begin
[10] pry(main)> Ripper.sexp(file)
=> [:program,
 [[:module,
   [:const_ref, [:@const, "Admin", [9, 7]]],
   [:bodystmt,
    [[:void_stmt],
     [:class,
      [:const_ref, [:@const, "User", [10, 8]]],
      [:var_ref, [:@const, "ApplicationRecord", [10, 15]]],
      [:bodystmt, [[:void_stmt]], nil, nil, nil]]],
    nil,
    nil,
    nil]]]]
=end

require "ripper"

class CustomParser < Ripper
  # Overview of Ripper: https://kddnewton.com/2022/02/14/formatting-ruby-part-1.html
  # Ripper API: https://kddnewton.com/ripper-docs/events

  class << self
    def parse(string)
      parser = new(string).tap { |p| p.parse }
      parser.items
    end
  end

  attr_reader :items

  def initialize(...)
    super
    @items = []
  end

  def on_module(const, _bodystmt)= @items << [const, lineno]

  def on_class(const, _superclass, _bodystmt)= @items << [const, lineno]
end

=begin
[12] pry(main)> CustomParser.parse(file)
=> [["User", 11], ["Admin", 12]]
=end