# File lib/rubygems/doc_manager.rb, line 206
  def uninstall_doc
    raise Gem::FilePermissionError.new(@spec.installation_path) unless
    File.writable? @spec.installation_path

    original_name = [
      @spec.name, @spec.version, @spec.original_platform].join '-'

    doc_dir = File.join @spec.installation_path, 'doc', @spec.full_name
    unless File.directory? doc_dir then
      doc_dir = File.join @spec.installation_path, 'doc', original_name
    end

    FileUtils.rm_rf doc_dir

    ri_dir = File.join @spec.installation_path, 'ri', @spec.full_name

    unless File.directory? ri_dir then
      ri_dir = File.join @spec.installation_path, 'ri', original_name
    end

    FileUtils.rm_rf ri_dir
  end