AA keys

[bearophile]

Jarrett Billingsley:
> There were originally some bugs in std.format's array and AA handling,
> but this is definitely not an output bug. I'd bugzilla it if I were you.

I think this is the 13th bug I have found so far :-)
I think this may be caused by the fact that AAs don't have an == defined yet (and no one seem to care). I can use my equalAA() function for most purposes, but I presume hashing needs an == too, and I can't fix that with an external function.

Bye,
bearophile