Blocked revisions 71796 via svnmerge

Blocked revisions 71796 via svnmerge

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  r71796 | eric.smith | 2009-04-22 09:29:05 -0400 (Wed, 22 Apr 2009) | 20 lines

  Backport of some of the work in r71665 to trunk. This reworks much of
  int, long, and float __format__(), and it keeps their implementation
  in sync with py3k.

  Also added PyOS_double_to_string. This is the "fallback" version
  that's also available in trunk, and should be kept in sync with that
  code. I'll add an issue to document PyOS_double_to_string in the C
  API.

  There are many internal cleanups. Externally visible changes include:

  - Implement PEP 378, Format Specifier for Thousands Separator, for
    floats, ints, and longs.

  - Issue #5515: 'n' formatting for ints, longs, and floats handles
    leading zero formatting poorly.

  - Issue #5772: For float.__format__, don't add a trailing ".0" if
    we're using no type code and we have an exponent.
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