RE: Rectangular regions

[Drew Adams]

> > But I never use C-] for abort-recursive-edit. Comments?
> 
> IMO for most users setting a rectangular mark will be done
> infrequently enough that it would be a waste to dedicate C-]
> to it.

Agreed; it would be a waste - whether or not it is used
frequently.  Likewise for other simple repeatable keys mentioned,
such as `M-]', `M-SPC', `C-SPC', `M-#', and `M-+'.

> C-x r C-SPC seems like a reasonable default binding to me for
> the reasons I mentioned earlier, and naturally users that
> prefer shorter bindings would be free to assign them in their
> init files.

Yes.  Put the key on prefix `C-x r'.  Do not waste a quick key
on it.