Fix Sierra Trac query

[Chris Jones]

You could just avoid the problem by using the numerical OS designation. macOS10.13 etc. Personally i prefer these to the random cat/place names anyway. Perhaps i am in a minority on this...

Chris

> On 26 Sep 2017, at 1:36 am, Ryan Schmidt <ryandesign at macports.org> wrote:
> 
> Could someone with some Trac knowledge fix the query that shows the list of tickets on the Sierra Problems page:
> 
> https://trac.macports.org/wiki/SierraProblems
> 
> Now that we are using the "highsierra" keyword for macOS High Sierra problems, the SierraProblems page is including those in its search results, which isn't what we wanted, since we already have a High Sierra Problems page for that:
> 
> https://trac.macports.org/wiki/HighSierraProblems
> 
> -
> 
> We already had this problem long ago with the Lion Problems page showing Mountain Lion tickets as well:
> 
> https://trac.macports.org/wiki/LionProblems
> 
> But we never fixed the problem, instead opting to never create a Mountain Lion Problems page.
>