[Zope] ZWiki: kludge around title-related error

Not long ago I upgraded the ZWiki product to ZWiki-0-27-1. I thought it was working o.k. until today when I started getting a KeyError with Values that were the same as the ZWiki Page title. If I blanked the title, no error was generated but that would break a bunch of things I already use. I tried upgrading to ZWiki-0-28-0. That had no effect. The expression causing the problem was standard:'here/primaryParentUrl' so I tried just removing it from wikipage_macros.pt (line 85). That seems to have solved the problem. --kyler