[PATCH 2 of 2] bookmarks: adjust exception type so present(bookmark(.)) works as expected

[Augie Fackler]

> On Aug 25, 2018, at 7:56 AM, Yuya Nishihara <yuya at tcha.org> wrote:
> 
> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1535195967 -32400
> #      Sat Aug 25 20:19:27 2018 +0900
> # Node ID 593795f469e98d0ced03046c7cff7233341851a4
> # Parent  d3e265cb2ff891c7b7a7779399017c69fee0aef7
> bookmarks: adjust exception type so present(bookmark(.)) works as expected

queued, tahnks