[issue14521] math.copysign(1., float('nan')) returns -1.

[Roundup Robot]

Roundup Robot added the comment:

New changeset 121cb9596e7d by Mark Dickinson in branch '3.2':
Remove overeager test (don't depend on the sign of a nan;  cf. issue #14521)
http://hg.python.org/cpython/rev/121cb9596e7d

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<http://bugs.python.org/issue14521>
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