nested formatting commands fails?

[barmar@Think.COM (Barry Margolin)]

    Date: Tue, 29 Jan 91 17:23 EST
    From: pc@ctt.ctt.bellcore.com (Peter Clitherow)

    I'm having trouble doing something fairly trivial, yet it mysteriously
    fails.  I want to format a list inside a filling-output enviroment.  The
    Docex said somewhat cryptically that "Most simple combinations of
    formatted output macros work inside of one another".  Yet when i try:

Unfortunately, I think INDENTING-OUTPUT has trouble working with lots of
streams.

                                                barmar