save_cache

# File lib/rdoc/ri/store.rb, line 173
  def save_cache
    # HACK mongrel-1.1.5 documents its files twice
    @cache[:attributes].      each do |_, m| m.uniq!; m.sort! end
    @cache[:class_methods].   each do |_, m| m.uniq!; m.sort! end
    @cache[:instance_methods].each do |_, m| m.uniq!; m.sort! end

    open cache_path, 'wb' do |io|
      Marshal.dump @cache, io
    end
  end