[doc] improve MI varobj introduction

[Vladimir Prus]

On Tuesday 26 December 2006 18:32, Daniel Jacobowitz wrote:
> On Thu, Dec 21, 2006 at 09:14:43AM +0300, Vladimir Prus wrote:
> > >  > > Also expanding the introduction allows the removal of the summary of
> > >  > > commands which just duplicates what comes after.
> > >  > 
> > >  > I'm not sure -- which summaries can be removed now?
> > > 
> > > The list just after:
> > > 
> > >  The following is the complete set of GDB/MI operations...
> > 
> > I don't have an opinion. If the list was clickable, it would be useful, but it's not,
> > and I don't know if info can be persuaded that make them clickable (and not
> > very interested to change that, anyway)
> 
> It can be, if you use @xref or @pxref.  There's plenty of examples in
> the manual.  They're already marked with @findex, which I think
> suffices - try @xref{-var-list-children}.

Okay. Anyway, this is a separate change.

> I didn't really follow this thread, but I would recommend posting a
> revised version of the patch with any changes when you're ready to.

I don't have any planned changes so far, except for three-word editorial change
suggested by Nick.

- Volodya