hg update --inactive should behave like update except that
it should not activate deactivated bookmarks and
should not print the related ui.status outputs
(eg: "activating bookmarks")

Set up the repository.
  $ hg init repo
  $ cd repo
  $ hg debugbuilddag -m '+4 *3 +1'
  $ hg bookmark -r 7db39547e641 test
  $ hg update test
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark test)
  $ hg bookmarks
   * test                      5:7db39547e641
  $ hg bookmark -i test
  $ hg update --inactive test
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bookmarks
     test                      5:7db39547e641
  $ hg bookmark -r 09bb8c08de89 test2
  $ hg update test
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark test)
  $ hg update --inactive test2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (leaving bookmark test)
  $ hg bookmarks
     test                      5:7db39547e641
     test2                     1:09bb8c08de89
  $ hg update --inactive test
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bookmarks
     test                      5:7db39547e641
     test2                     1:09bb8c08de89