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

@@ -540,6 +540,7 @@ class IEEEFormatTestCase(unittest.TestCase):
 
     @requires_IEEE_754
     def test_format_testfile(self):
+        with open(format_testfile) as testfile:
             for line in open(format_testfile):
                 if line.startswith('--'):
                     continue