Merged revisions 81947-81950,81955-81956 via svnmerge from

Merged revisions 81947-81950,81955-81956 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r81947 | mark.dickinson | 2010-06-12 16:17:02 +0100 (Sat, 12 Jun 2010) | 3 lines

  Issue #8973:  Add __all__ to struct module, so that help(struct) correctly
  displays information for the struct.Struct class.
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  r81948 | mark.dickinson | 2010-06-12 16:19:23 +0100 (Sat, 12 Jun 2010) | 1 line

  Remove accidental (yet-to-be-reviewed) docstring changes included in r81947.
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  r81949 | mark.dickinson | 2010-06-12 16:43:45 +0100 (Sat, 12 Jun 2010) | 1 line

  Issue #8973:  Improve struct module docstrings.
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  r81950 | mark.dickinson | 2010-06-12 17:30:53 +0100 (Sat, 12 Jun 2010) | 1 line

  More struct module docs and docstring tweaks.
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  r81955 | mark.dickinson | 2010-06-12 19:20:47 +0100 (Sat, 12 Jun 2010) | 1 line

  Issue #8469: add standard sizes to struct docs table.
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  r81956 | mark.dickinson | 2010-06-12 19:37:54 +0100 (Sat, 12 Jun 2010) | 2 lines

  Issue #8469:  Reorder struct module sections for clarity;  other minor tweaks.
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