Fix Sierra Trac query

[Chris Jones]

On 27/09/17 15:58, Chris Jones wrote:
> 
> 
> On 27/09/17 15:41, Rainer Müller wrote:
>> On 2017-09-27 16:12, Chris Jones wrote:
>>> [[TicketQuery(component=ports&status!=closed&keywords~=sierra 
>>> -highsierra,or,keywords~=10\.12)]]
>>
>> As I understand it, this will exclude any ticket which has both sierra 
>> and highsierra as keywords...
> 
> Hmmm... Maybe yes. Can we create a test ticket to try this out ?

Note though the High Sierra page would at least pick it up, so if true 
perhaps not too bad ?