Argh. I lost 1.5 day's worth of work on revision 6 of this patch last
night, due to me being tired and over-aggressively cleaning my working
directories. I will have to reconstruct it from memory, hopefully
Tuesday. (I basically know what I did, and going through the process
again should be much quicker.)
I have more C fixes by the way:
* PyTypeObject needs to also expose __text_signature__. Otherwise
builtin classes can't have signatures.
* There are a bunch of default docstrings for tp_ etc. slots
(__add__, __call__) that live in typeobject.c. I'll hand-convert
them to have signatures and reasonable docstrings.