[Question regarding FORMAT with ~:^ within ~:{]

[ejs%acorn@oak.lcs.mit.edu]

> Date: Mon, 9 Nov 87 18:53:10 PST
> From: R Dunbar Poor <edsel!r@labrea.stanford.edu>
> To: labrea!common-lisp%sail.stanford.edu@labrea.stanford.edu
> Subject: Question regarding FORMAT with ~:^ within ~:{
> 
>   ...
> 
> 	(format nil "~:{~@?~:^...~}" '(("a") ("b")))
> 
> 
> MY CLAIM: It should return "a".
> 

For what it's worth, GCLISP 3.0 returns "a" as well.