[CM] Let formatted incorrectly

[chohag at jtan.com]

bil at ccrma.Stanford.EDU writes:
> Thanks for the bug report!  I think that way of fixing the
> bug messes up some error messages (wrong type argument errors). Perhaps 
> this will work:
>
> line 35958 (in slot_to_port)
> object_to_port_with_circle_check(sc, slot_value(obj), port, 
> not_p_display(use_write), ci);
>
> This is how hash_table_to_port and others handle it.
> Thanks again.
>

I thought my change looked too simple. The format and related
functions were far too big to go hunting for such a trivial error
given that it doesn't actually affect me --- I just saw it in passing
when I printed a let's contents while debugging --- and I figured
you'd immediately know where the "do it like a hash table does it"
button was.

Matthew