[tex-k] Possible error in The TeXbook Chapter 24

Karl Berry karl at freefriends.org
Fri Oct 25 01:08:39 CEST 2019

    So the formal syntax for <optional true> should be:

    > <optional {\tt true}>\is<optional spaces>
    >   \alt<optional {\tt true}>[true]<optional spaces>

I think you are right. I will put on the pile for Don's next review (in
2021). Thanks!

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