bug#17453: Isearch doesn't work properly with Follow Mode.

[Drew Adams]

> > I believe this was already taken care of by work that Juri did recently.
> > I don't have time to look this up now, but see recent bug reports.
> 
> I ran a git log on isearch.el and I think you're referring to this change:
> 
> 10ec0468dfbc0815a772cc46a031aca298af0985 Lazy-highlight the whole
> string at point (debbugs:19353)
> 
> If so, that's just about extending the bound a little bit to ensure it
> holds a whole symbol. follow-mode actually needs to extend the bound a
> lot more (up 'till the `window-end' of the last window in the group).

Please check with Juri.  I'm pretty sure the discussion included
the possibility of having lazy highlighting throughout a buffer.