<Someone>'s message said this was committed, but the cvs repository
didn't reflect his changes.
> Subject: patch: #rub touchstone
> Date: Wed, 20 Feb 2002 23:33:27 -0800
> <email deleted>
>
> Implement <Someone>'s suggestion.
>
> - allow the #rub command to apply to gray stones
> - update various doc & help files to reflect the change
>
> Committed to CVS.
4bc3561a96