largest indentation

code.rb

module Cainiao
  ...
  def self.main login, password, month, from, to, log_bt = false
    ...
    @mutex.synchronize do
      ...
      [true, xlsx_string[
        paginate.call ->{
          YAML::Store.new("cache.yaml").transaction do |store|
            table.tap{ |_| fail unless 1 <= _.size }.flat_map.with_index do |act, i|
              ...
              f = lambda do |cell, context = nil, expected = 2|
                ...
                dump_on_error.call tab do
                  ...
                  begin
                    browser.until_true 7 do
                      ...
                    end
                  rescue Timeout::Error
                    ...
                  end