# File lib/rubygems/doc_manager.rb, line 20
    def initialize(spec, rdoc_args="")
      @spec = spec
      @doc_dir = File.join(spec.installation_path, "doc", spec.full_name)
      Gem::FilePermissionError.new(spec.installation_path) unless File.writable?(spec.installation_path)
      @rdoc_args = rdoc_args.nil? ? [] : rdoc_args.split
    end