Shopify note saving bug https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/note-being-modified-187804

gistfile1.rb

require 'date'
require 'rubygems'
require 'shopify_api'
ShopifyAPI::Base.site = '...'

@order = ShopifyAPI::Order.new
@order.line_items = [{
  :quantity => 1,
  :product_id => 222,
  :variant_id => 333
}]

@trial_count = 1

def trial(note)
  puts "trial #{@trial_count}"
  puts "  before:"
  puts "    #{note.inspect}"
  @order.note = note
  @order.save!

  @order.reload
  puts "  after:"
  puts "    #{@order.note.inspect}"
  @trial_count += 1
end

trial "#{Date.today}\nfoo"
trial "#{Date.today} \nbar"
trial "#{Date.today}baz"
trial "#{Date.today} qux"