[MERGE] (0.17) reworked LogFormatter API

[Andrew Bennetts]

Kent Gibson wrote:
[...]
> > You can do the same check by running 'make check'. Though it means
> > running the whole test suite 3 times. (once normal, once with
> > LANG=ASCII, and once with python -O)
> >
> Ok, will try to remember to do that next time I deprecate an API
> (don't hold your breath).
> I had thought bzr selftest was sufficient.

If you run "python -Werror bzr selftest", it will be sufficient to fail on any
deprecation warnings (so long as those warnings aren't only triggered when
running with LANG=ASCII or -O...).

-Andrew.