[no subject]

[cwh@MIT-AI]

When (TYI STREAM) is done, the TYI'ed character should be echoed to STREAM, not
to STANDARD-OUTPUT.  Echoing will only happen if the stream is interactive, so
it is safe to assume that STREAM can support the :TYO operation.

I also think that (TYI STREAM) should be the same as (FUNCALL STREAM ':TYI)
and that either the stream should decide whether or not to echo on :TYI,
or separate :TYI and :TYI-ECHO operations should be defined for the stream.