Random simply bit of text. Cant seem to figure out the difference

gistfile1.txt

require "./todo_item"

class TodoList
	attr_reader = :name, :todo_items
	
	def initialize(name)
		@name = name
		@todo_items = [ ]
	end

	def add_item(name)
		todo_items.push(TodoItem.new(name))
	end	
end

todo_list = TodoList.new("Groceries")
todo_list.add_item("Milk")
todo_list.add_item("Eggs")
puts todo_list.inspect


=begin
require "./todo_item"

class TodoList
	attr_reader :name, :todo_items

	def initialize(name)
		@name = name
		@todo_items = []
	end

	def add_item(name)
		todo_items.push(TodoItem.new(name))
	end
end

todo_list = TodoList.new("Groceries")
todo_list.add_item("Milk")
todo_list.add_item("Eggs")

puts todo_list.inspect
=end

The commented out code for some reason works, but the non commented out part doesn't work, 
UNLESS you add an @ to the todo_items in the add_item method

Am I going crazy, or am I missing some so simple?