uninstall_doc

# File lib/rubygems/doc_manager.rb, line 220
  def uninstall_doc
    base_dir = @spec.base_dir
    raise Gem::FilePermissionError.new base_dir unless File.writable? base_dir

    # TODO: ok... that's twice... ugh
    old_name = [
      @spec.name, @spec.version, @spec.original_platform].join '-'

    doc_dir = @spec.doc_dir
    unless File.directory? doc_dir then
      doc_dir = File.join File.dirname(doc_dir), old_name
    end

    ri_dir = @spec.ri_dir
    unless File.directory? ri_dir then
      ri_dir = File.join File.dirname(ri_dir), old_name
    end

    FileUtils.rm_rf doc_dir
    FileUtils.rm_rf ri_dir
  end