bug#397: 23.0.60; T in Info when in (dir)

[Drew Adams]

> > Thanks, but that is not the whole fix.  You missed this part:
> >
> >     and (2) disable (dim) the corresponding item in the
> >     Info menu when in (dir).
> >
> > The Info menu correctly has things like Up disabled (dimmed).
> > But menu item Table of Contents (T) is not disabled.
> > Please fix this part of the bug also.
> 
> Hm...  I don't quite follow.  Do you have a complete recipe, starting
> from -Q?

emacs -Q
C-h i

Look at the Info menu, in the menu bar.  See the menu item
`Table of Contents           T'?  It should be disabled
when at the (dir), i.e., the top, level.