fix test so that it passes

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4009 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/test/associations_join_model_test.rb

@@ -313,7 +313,7 @@ def test_self_referential_has_many_through
   def test_add_to_self_referential_has_many_through
     new_author = Author.create(:name => "Bob")
     authors(:david).author_favorites.create :favorite_author => new_author
-    assert_equal [new_author, authors(:mary)], authors(:david).reload.favorite_authors
+    assert_equal new_author, authors(:david).reload.favorite_authors.first
   end
 
   private