key<entry_description> not found

[jwoertink]

I was just trying the example in the README:

require "guevara"

nacha = Guevara::Nacha.new(
  priority_code:    01,
  destination_id:   '12345678',
  origin_id:        '12345678',
  created_at:       '2014-11-28T13:30',
  id:               'A',
  destination_name: 'Rubylit',
  origin_name:      'Zest',
  batches:          [
    {
      service_class:  '200',
      company_name:   'rubylit',
      company_id:     'Ruby123',
      company_date:   '2014-09-18',
      origin_id:      '12345678',
      effective_date: '2014-09-21',
      transactions:   [{
        id:               'FD00AFA8A0F7',
        type:             'debit',
        amount:           1600,
        name:             'marge baker',
        additional_info:  'wellsville|KS|66092|101 2nd st|',
        telephone:        '5858232966',
        account_type:     'checking',
        routing_number:   103100195,
        account_number:   '3ACCOUNT234'
      }]
    }
  ]
)

puts nacha.to_s

running this with ruby test.tb gives me this error:

❯ ruby test.rb 
/home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/row.rb:23:in `format': key<entry_description> not found (KeyError)
	from /home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/row.rb:23:in `to_s'
	from /home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/batch.rb:20:in `to_s'
	from /home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/nacha.rb:25:in `block in to_s'
	from /home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/nacha.rb:25:in `each'
	from /home/jeremy/.asdf/installs/ruby/3.1.3/lib/ruby/gems/3.1.0/gems/guevara-1.0.0/lib/guevara/nacha.rb:25:in `to_s'
	from test.rb:34:in `<main>'

Here's my Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    guevara (1.0.0)

PLATFORMS
  x86_64-linux

DEPENDENCIES
  guevara

BUNDLED WITH
   2.3.9

I tried on Ruby 2.5, 2.7, and 3.1