save_cache

# File lib/rdoc/ri/store.rb, line 239
  def save_cache
    clean_cache_collection @cache[:ancestors]
    clean_cache_collection @cache[:attributes]
    clean_cache_collection @cache[:class_methods]
    clean_cache_collection @cache[:instance_methods]

    @cache[:modules].uniq!
    @cache[:modules].sort!
    @cache[:encoding] = @encoding # this gets set twice due to assert_cache

    return if @dry_run

    marshal = Marshal.dump @cache

    open cache_path, 'wb' do |io|
      io.write marshal
    end
  end