Will port to 3.0

* Replace dramatic footnote with in-line comment about possible round-off errors in logarithms of large numbers.
* Add comments to the pure python code equivalent.
* replace floor() with int() in the mathematical equivalent so the type is correct (should be an int, not a float).
* add abs() to the mathematical equivalent so that it matches the previous line that it is supposed to be equivalent to.
* make one combined example with a negative input.

Thanks Ned Deily.

Patch by Neil Schemenauer, very slightly modified.

Thanks Fredrik Johansson and Victor Stinner for code,
Raymond Hettinger for review.

Merged revisions 67427,67431,67433,67435,67630,67652,67656-67657,67674-67675,67678-67679,67705-67706,67716,67723,67765-67771,67774,67776,67778 via svnmerge from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

........
  r67427 | benjamin.peterson | 2008-11-28 16:07:41 -0600 (Fri, 28 Nov 2008) | 1 line

  fix spelling in comment
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  r67431 | benjamin.peterson | 2008-11-28 17:14:08 -0600 (Fri, 28 Nov 2008) | 1 line

  add a scripts directory; move things to it
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  r67433 | benjamin.peterson | 2008-11-28 17:18:48 -0600 (Fri, 28 Nov 2008) | 1 line

  run svneol.py
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  r67435 | benjamin.peterson | 2008-11-28 17:25:03 -0600 (Fri, 28 Nov 2008) | 1 line

  rename pre/post_order_mapping to pre/post_order_heads
........
  r67630 | alexandre.vassalotti | 2008-12-06 21:51:56 -0600 (Sat, 06 Dec 2008) | 2 lines

  Fix typo in the urllib2.HTTPDigestAuthHandler fixer.
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  r67652 | armin.ronacher | 2008-12-07 15:39:43 -0600 (Sun, 07 Dec 2008) | 5 lines

  Added a fixer that cleans up a tuple argument to isinstance after the tokens
  in it were fixed.  This is mainly used to remove double occurrences of
  tokens as a leftover of the long -> int / unicode -> str conversion.
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  r67656 | armin.ronacher | 2008-12-07 16:54:16 -0600 (Sun, 07 Dec 2008) | 3 lines

  Added missing copyright fo 2to3 fix_isinstance.
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  r67657 | armin.ronacher | 2008-12-07 18:29:35 -0600 (Sun, 07 Dec 2008) | 3 lines

  2to3: intern and reduce fixes now add the imports if missing.  Because that is a common task the fixer_util module now has a function "touch_import" that adds imports if missing.
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  r67674 | benjamin.peterson | 2008-12-08 19:58:11 -0600 (Mon, 08 Dec 2008) | 1 line

  copy permission bits when making backup files #4602
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  r67675 | benjamin.peterson | 2008-12-08 19:59:11 -0600 (Mon, 08 Dec 2008) | 1 line

  add forgotten import
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  r67678 | benjamin.peterson | 2008-12-08 20:08:30 -0600 (Mon, 08 Dec 2008) | 1 line

  fix #4602 for real
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  r67679 | armin.ronacher | 2008-12-09 00:54:03 -0600 (Tue, 09 Dec 2008) | 3 lines

  Removed redudant code from the 2to3 long fixer.  This fixes #4590.
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  r67705 | benjamin.peterson | 2008-12-11 13:04:08 -0600 (Thu, 11 Dec 2008) | 1 line

  put trailers after a range call after the list()
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  r67706 | benjamin.peterson | 2008-12-11 13:17:57 -0600 (Thu, 11 Dec 2008) | 1 line

  add html related modules to the fix_imports mapping
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  r67716 | benjamin.peterson | 2008-12-11 22:16:47 -0600 (Thu, 11 Dec 2008) | 1 line

  consolidate tests
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  r67723 | benjamin.peterson | 2008-12-12 19:49:31 -0600 (Fri, 12 Dec 2008) | 1 line

  fix name
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  r67765 | benjamin.peterson | 2008-12-14 14:05:05 -0600 (Sun, 14 Dec 2008) | 1 line

  run fix_isinstance after fix_long and fix_unicode
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  r67766 | benjamin.peterson | 2008-12-14 14:13:05 -0600 (Sun, 14 Dec 2008) | 1 line

  use run_order instead of order
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  r67767 | benjamin.peterson | 2008-12-14 14:28:12 -0600 (Sun, 14 Dec 2008) | 1 line

  don't retain parenthesis if there is only one item left
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  r67768 | benjamin.peterson | 2008-12-14 14:32:30 -0600 (Sun, 14 Dec 2008) | 1 line

  use insert_child()
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  r67769 | benjamin.peterson | 2008-12-14 14:59:10 -0600 (Sun, 14 Dec 2008) | 1 line

  parenthesize doesn't belong in pygram or FixerBase
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  r67770 | alexandre.vassalotti | 2008-12-14 15:15:36 -0600 (Sun, 14 Dec 2008) | 2 lines

  Fix typo: html.paser -> html.parser.
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  r67771 | benjamin.peterson | 2008-12-14 15:22:09 -0600 (Sun, 14 Dec 2008) | 1 line

  altering .children needs to call changed()
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  r67774 | benjamin.peterson | 2008-12-14 15:55:38 -0600 (Sun, 14 Dec 2008) | 1 line

  employ an evil hack to fix multiple names in the same import statement
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  r67776 | benjamin.peterson | 2008-12-14 16:22:38 -0600 (Sun, 14 Dec 2008) | 1 line

  make a common mixin class for Test_imports and friends
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  r67778 | alexandre.vassalotti | 2008-12-14 17:48:20 -0600 (Sun, 14 Dec 2008) | 2 lines

  Make fix_imports refactor multiple imports as.
........

Patch by haypo.

Will port to 2.6. hotshot was deleted from python 3.

Issue #4197: Fix the remaining part of the doctest-in-zipfile problem by giving linecache access to the module globals when available

Fix several issues relating to access to source code inside zipfiles. Initial work by Alexander Belopolsky. See Misc/NEWS in this checkin for details.

Issue #4163: Use unicode-friendly word splitting in the textwrap functions when given an unicode string.

Solaris and OpenBSD.  Fix this by handling special values and domain
errors directly in mathmodule.c, passing only positive nonspecial floats
to the system log/log10.

give correct results in the case where one argument is a quiet NaN
and the other is a finite number that requires rounding.
Thanks Mark Dickinson.

conversion to bool raises an exception, 'with' loses that exception.

Reviewed by Jeffrey Yasskin.
Already ported to 2.5, will port to 2.6 and 3.0