Code review comment for lp:~mnordhoff/loggerhead/statictuples

Matt Nordhoff wrote:
> Also, you need to run it against lp:~jameinel/bzr/2.1-st-concat,
> which has a proposal up for merging to bzr.dev.

FYI, this has landed now. Pickle support has been approved, so it will
hopefully land soon as well.