Small fixes for 8e503fa54d2d (hg heads branch)

mercurial/commands.py

@@ -1232,8 +1232,7 b' def heads(ui, repo, *branchrevs, **opts)'
         heads = repo.heads(start)
     else:
         heads = []
-        visitedset = set()
-        displayer = cmdutil.show_changeset(ui, repo, opts)
+        visitedset = util.set()
         for branchrev in branchrevs:
             branch = repo.changectx(branchrev).branch()
             if branch in visitedset:

tests/test-bheads.out

@@ -234,7 +234,7 b' date: Thu Jan 01 00:00:07 1970 +0'
 summary:     Adding c branch
 
 =======
-No changes on branch c (the branch of revision .) are reachable from revision 3
+no changes on branch c containing . are reachable from 3
 1
 -------
 changeset:   7:9fb091bb9835
@@ -273,7 +273,7 b' summary: Merging b branch head 2 and'
 
 0
 -------
-No changes on branch b (the branch of revision .) are reachable from revision 7
+no changes on branch b containing . are reachable from 7
 1
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 0 files updated, 0 files merged, 2 files removed, 0 files unresolved