Move __builtins__.trunc() to math.trunc() per
http://mail.python.org/pipermail/python-dev/2008-January/076626.html and issue
1965.
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 0ea4a36..0c8852c 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -25,10 +25,11 @@
 """
 from __future__ import with_statement
 
-import unittest
 import glob
+import math
 import os, sys
 import pickle, copy
+import unittest
 from decimal import *
 from test.test_support import (TestSkipped, run_unittest, run_doctest,
                                is_resource_enabled)
@@ -1225,7 +1226,7 @@
             # should work the same as to_integral in the ROUND_DOWN mode
             d = Decimal(s)
             r = d.to_integral(ROUND_DOWN)
-            self.assertEqual(Decimal(trunc(d)), r)
+            self.assertEqual(Decimal(math.trunc(d)), r)
 
 class ContextAPItests(unittest.TestCase):