add truncate_table to doc
That's true -- I will look at adding similar functionality to the 3.0a branch and will document it there, as Peewee will be moving to the 3.0 branch soon. Well, actually, I think I'm going to omit it from the 3.x branch for now, so will leave as-is. But thank you for letting me know.
truncate_table is implemented on peewee, but not in doc. i hope it is written in doc.

https://github.com/coleifer/peewee/pull/862/files
