hgweb: expose sibling branches to templater

mercurial/hgweb/webutil.py

@@ -67,6 +67,7 b' def _siblings(siblings=[], hiderev=None)'
         d['user'] = s.user()
         d['date'] = s.date()
         d['description'] = s.description()
+        d['branch'] = s.branch()
         if hasattr(s, 'path'):
             d['file'] = s.path()
         yield d