RE: Rectangular regions

[Stephen J. Turnbull]

Drew Adams writes:

 > All the more reason to move it to the rectangle-command prefix,
 > `C-x r', where additional interesting things that are related
 > can also be placed.

+1

Discoverability of the default bindings is very important.  If it's on
C-x r, C-x r C-h will list it for you.

Users who use the function frequently can put it on an more accessible
sequence.