Merged revisions 86003 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r86003 | brian.curtin | 2010-10-30 19:03:45 -0500 (Sat, 30 Oct 2010) | 2 lines

  Fix ResourceWarning. Use context manager to properly close file.
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Lib/test/test_float.py

@@ -401,7 +401,8 @@ class FormatTestCase(unittest.TestCase):
     @unittest.skipUnless(float.__getformat__("double").startswith("IEEE"),
                          "test requires IEEE 754 doubles")
     def test_format_testfile(self):
-        for line in open(format_testfile):
+        with open(format_testfile) as testfile:
+            for line in testfile:
                 if line.startswith('--'):
                     continue
                 line = line.strip()