doc: fix references to `revset.abstractsmartset`

Differential Revision: https://phab.mercurial-scm.org/D7873

mercurial/localrepo.py

@@ -1644,7 +1644,7 b' class localrepository(object):'
         user aliases, consider calling ``scmutil.revrange()`` or
         ``repo.anyrevs([expr], user=True)``.
 
-        Returns a revset.abstractsmartset, which is a list-like interface
+        Returns a smartset.abstractsmartset, which is a list-like interface
         that contains integer revisions.
         '''
         tree = revsetlang.spectree(expr, *args)

mercurial/scmutil.py

@@ -748,7 +748,7 b' def revrange(repo, specs, localalias=Non'
 
     Specifying a single revset is allowed.
 
-    Returns a ``revset.abstractsmartset`` which is a list-like interface over
+    Returns a ``smartset.abstractsmartset`` which is a list-like interface over
     integer revisions.
     """
     allspecs = []