[issue26040] Improve coverage and rigour of test.test_math

[Ned Deily]

Ned Deily added the comment:

Mark, many buildbots are unhappy.  For example:

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FAIL: test_testfile (test.test_math.MathTests)
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Traceback (most recent call last):
  File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/test_math.py", line 1106, in test_testfile
    self.ftest("%s:%s(%r)" % (id, fn, ar), result, er)
  File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/test_math.py", line 194, in ftest
    (name, value, expected))
AssertionError: cosh0063:cosh(709.7827) returned 8.988349783319008e+307, expected 8.988349783319007e+307

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nosy: +ned.deily

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26040>
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