[R6RS] Does for-each tail-call on last element?

[William D Clinger]

Kent wrote:
> It seems like an unnecessary constraint to me, but I don't care much one
> way or the other.  If we do make this change, we can no longer claim
> for-each returns an (the) unspecified value.

Not only that, but a call to for-each might return
0 values or multiple values.  I'm fine with that.

Will