Blocked revisions 87039-87040,87043-87044 via svnmerge

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  r87039 | eric.smith | 2010-12-04 08:27:34 -0500 (Sat, 04 Dec 2010) | 1 line

  Removed static function complex_format, moved it into complex_repr. Modified tests to check both str and repr, which are the same for complex.
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  r87040 | eric.smith | 2010-12-04 08:32:18 -0500 (Sat, 04 Dec 2010) | 1 line

  Issue #10624: Move requires_IEEE_754 into test.support. I'll fix up other uses of it shortly.
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  r87043 | eric.smith | 2010-12-04 10:17:38 -0500 (Sat, 04 Dec 2010) | 1 line

  Issue #10624: Use support.requires_IEEE_754 in all appropriate tests.
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  r87044 | eric.smith | 2010-12-04 10:26:13 -0500 (Sat, 04 Dec 2010) | 1 line

  Issue 10625: Add tests for negative zeros in complex str and repr.
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