* (
bug 26856) Fix category tree AJAX expansion and inline use for category names that match namespace names ending in colon
The previous check that checked for the alt-namespace case caught things for 'Category:Wikipedia:Foo' but not for 'Category:Wikipedia:', where the 'Wikipedia:' alone doesn't return a legit title.
(Conceivably, Title::newFromText() should actually handle this case when an alt ns is given, should be examined later.)