Those do seem to be mistakes. It looks like this might have been caused by the Windows-newlining of ac.scm, which screwed with the Git history a little. I'll change these to the arc2 versions... if you see any other inconsistencies, let me know.
I've changed ac-call to the arc2 version, but I think you're wrong about ac-fn. The following:
(define (ac-fn args body env)
(if (ac-complex-args? args)
(ac-complex-fn args body env)
`(lambda ,(let ((a (ac-denil args))) (if (eqv? a 'nil) '() a))
'nil
,@(ac-body body (append (ac-arglist args) env)))))
is how it's been in arc0, arc1, and arc2. The following:
(define (ac-fn args body env)
(if (ac-complex-args? args)
(ac-complex-fn args body env)
`(lambda ,(let ((a (ac-denil args))) (if (eqv? a 'nil) '() a))
,@(ac-body* body (append (ac-arglist args) env)))))
is unique to Anarki, and was added as part of a patch for MzScheme compatibility.
After getting rid of all the trailing-whitespace-removal that was clogging the diffs, I think ac-call was the only non-purposeful difference between ac.scm in Anarki and arc2. Let me know if you notice any more, though.
