Added CCL facility r=r "range" which is similar to r=o "ordered" but
does not require white-space before and after the dash in a range, e.g.
x=-1990 is equivalent to x <= 1990 iff r=r, but equivalent to x= -1980
Added CCL facility r=r "range" which is similar to r=o "ordered" but
does not require white-space before and after the dash in a range, e.g.
x=-1990 is equivalent to x <= 1990 iff r=r, but equivalent to x= -1980