Change the PyUnit-based tests to use the test_main() approach.  This
allows using the tests with unittest.py as a script.  The tests will
still run when run as a script themselves.
diff --git a/Lib/test/test_pprint.py b/Lib/test/test_pprint.py
index 34c7a84..167b4ac 100644
--- a/Lib/test/test_pprint.py
+++ b/Lib/test/test_pprint.py
@@ -76,4 +76,10 @@
                 verify(native == got, "expected %s got %s from pprint.%s" %
                                       (native, got, function))
 
-test_support.run_unittest(QueryTestCase)
+
+def test_main():
+    test_support.run_unittest(QueryTestCase)
+
+
+if __name__ == "__main__":
+    test_main()