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Re: assq compatibility with Maclisp

The "feature" in question is "fast" execution -- thus the (*rset nil)
case doesn't check the type of the list items.  I guess there was
an addition somewhere to the semantics of assoc/assq such that non-PAIR's
were treated as (NIL . NIL) -- apparently this didn't get put into
the "fast" non-error-checking loop?