Patch by Christian Heimes to change self.assert_(x == y) into
self.assertEqual(x, y).  (Christian used self.failUnlessEqual(),
but the double negative makes it hard to grok, so I changed it.)
diff --git a/Lib/test/test_richcmp.py b/Lib/test/test_richcmp.py
index ae33c92..180440e 100644
--- a/Lib/test/test_richcmp.py
+++ b/Lib/test/test_richcmp.py
@@ -272,9 +272,9 @@
             imag1b[k] = v
         imag2 = imag1b.copy()
         imag2[k] = v + 1.0
-        self.assert_(imag1a == imag1a)
-        self.assert_(imag1a == imag1b)
-        self.assert_(imag2 == imag2)
+        self.assertEqual(imag1a, imag1a)
+        self.assertEqual(imag1a, imag1b)
+        self.assertEqual(imag2, imag2)
         self.assert_(imag1a != imag2)
         for opname in ("lt", "le", "gt", "ge"):
             for op in opmap[opname]: