Code review comment for lp:~benji/testtools/modernize-tsfr

In fact TSFR *must* manage tag state itself; it has to supply either
the delta (by inspection) to what its state is at each synchronisation
point, or it has to supply a back-out-its-own-state command at the end
of each synchronisation point.

I'd be inclined to do the latter.

Do you have a SSCCE of the problem?

-Rob