131   date:        Thu Jan 01 00:00:00 1970 +0000

   131   date:        Thu Jan 01 00:00:00 1970 +0000

   132   summary:     0

   132   summary:     0

   133   

   133   

   134 

   134 

   135   $ hg log -r 'bookmark(unknown)'

   135   $ hg log -r 'bookmark(unknown)'

   136   abort: bookmark 'unknown' does not exist!

   139   abort: bookmark 'unknown' does not exist!

   137   [255]

   140   [255]

   138   $ hg log -r 'bookmark("re:unknown")'

   141   $ hg log -r 'bookmark("re:unknown")'

   139   abort: no bookmarks exist that match 'unknown'!

   142   abort: no bookmarks exist that match 'unknown'!

   140   [255]

   143   [255]