Misleading error message

[KMP at MIT-MC (Kent M. Pitman)]

(SSTATUS /! #'(LAMBDA () (READ)) SPLICING)
'(A . C !(C))
;MULTIPLE SPLICING MACROS RETURNED NON-NIL AFTER "." -- READ

This error message is misleading for two reasons:

  * There is only one splicing macro involved.

  * Non-NIL values are not the issue. Eg, '(A . !(B)) returns
    (A . B) as expected. 

-kmp