Re: integer overflow handling for most-negative-fixnum

[Stefan Monnier]

> I can add some form of bitwidth modifiers later if we find use cases that
> can help motivate what to do about the corner cases.

Another option for the "bitwidth case" is to do it outside of `format`.
I.e. instead of

    (format "%/32x" n)

you'd use

    (format "%x" (truncate-to-bitwidth n 32))

where `truncate-to-bitwidth` would turn a negative number into its
positive equivalent (mod 2^bitwidth).  That shouldn't be too hard to
implement in Elisp once we have bignums.


        Stefan