Re: texinfo.tex doesn't allow underscore in flag names for @ifset etc.

[W. L. Estes]

> It's documented; see the node "set value".  I've just sent to Karl
> Berry a suggested change for the Texinfo manual that would add an
> index entry "underscores in `set' and `value'", to make this easier to
> find.

But it's a bug that makeinfo and texi2dvi don't except the same
language.

--Will