obsolete: clarify users in markerusers() never contain None

mercurial/obsutil.py

@@ -822,7 +822,7 b' def markersusers(markers):'
     """ Returns a sorted list of markers users without duplicates
     """
     markersmeta = [dict(m[3]) for m in markers]
-    users = set(meta.get('user') for meta in markersmeta if meta.get('user'))
+    users = set(meta['user'] for meta in markersmeta if meta.get('user'))
 
     return sorted(users)