Allow use of ranges in copyright notices

[Robert Dewar]

On 7/2/2012 8:35 AM, Alexandre Oliva wrote:
> On Jun 30, 2012, David Edelsohn <dje.gcc@gmail.com> wrote:
>
>> IBM's policy specifies a comma:
>
>> <first year>, <last year>
>
>> and not a dash range.
>
> But this notation already means something else in our source tree.
>

I think using the dash is preferable, and is a VERY widely used
notation, used by all major software companies I deal with!