Re: mode-line tooltips for "[" and "]" in recursive-edit

[Lennart Borgman (gmail)]

Drew Adams wrote:
> >   > > It would be nice if [ and ] that appear in the mode-line in
> >   > > recursive-edit had a tooltip explaining what they are.  
> >   > > Such tooltips will be helpful for beginners.
...
> > To explain why this is needed: good UI design provides clues for what
> > the elements of the UI.  Tooltips are a way to provide such clues, we
> > use them already.  Suggestions for alternative
>
> That describes tooltips in general, and their raison d'etre. It is not an
> argument for adding these particular tooltips. 

Some reasons to add tooltips here:

- Those [...] is not there all the time so when they shows up the user 
may wonder, eh, should wonder.
- You may use Emacs for quite some time without seeing them.
- Some things might work strange during recursive editing.
- We have tooltips for other small pieces.
- This tooltip should/could be only on the borders, ie [ and ].