[plt-scheme] What does the collapse key command do?

I was looking through the menus today and I noticed that collapse
(c:r) shows up under the 'View' menu.

Split (c:m) splits the editor into two editors and Collapse (c:r)
closes the editor which has focus.

On 7/30/07, Robert Nikander <nikander at nc.rr.com> wrote:
>
> On Jul 29, 2007, at 1:01 PM, Grant Rettke wrote:
> > What does the balence-parens key command do?
>
> It's bound to ), ], and } right?  It means that hitting any of those
> keys doesn't necessarily insert that character.  Instead, it is smart
> enough to insert ), ], or } as appropriate, to balance the previous
> (, [, or {.
>
>
> > Collapse (c:r)
>
> I don't have that one.
>
>
> > collapse-space (m:space)
>
> Type on one line:
>
> a       b
>
> Then move the cursor to somewhere between the "a" and the "b", hit
> Esc-Space or Meta-Space, and it should collapse the space to:
>
> a b
>
>
> Rob
>