issue QUOTE-MAY-COPY, version 3

[Jon L White <jonl@lucid.com>]

re: To say that QUOTE copies in existing implementations is to
    imply that a lot of copying might happen that never actually
    happens.  COMPILE-FILE followed by LOAD effectively copies,
    and in KCL, COMPILE effectively makes a copy, but not QUOTE.

This may be repeating previous points, but we've been maintaing that
the phrase "QUOTE copies" does *not* mean that the function QUOTE 
does any work -- merely that the semantics of "quoted objects" is such
that you cannot tell whether you got the "original" or some copy
thereof.

-- JonL --