Merged revisions 59605-59624 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r59606 | georg.brandl | 2007-12-29 11:57:00 +0100 (Sat, 29 Dec 2007) | 2 lines

  Some cleanup in the docs.
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  r59611 | martin.v.loewis | 2007-12-29 19:49:21 +0100 (Sat, 29 Dec 2007) | 2 lines

  Bug #1699: Define _BSD_SOURCE only on OpenBSD.
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  r59612 | raymond.hettinger | 2007-12-29 23:09:34 +0100 (Sat, 29 Dec 2007) | 1 line

  Simpler documentation for itertools.tee().  Should be backported.
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  r59613 | raymond.hettinger | 2007-12-29 23:16:24 +0100 (Sat, 29 Dec 2007) | 1 line

  Improve docs for itertools.groupby().  The use of xrange(0) to create a unique object is less obvious than object().
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  r59620 | christian.heimes | 2007-12-31 15:47:07 +0100 (Mon, 31 Dec 2007) | 3 lines

  Added wininst-9.0.exe executable for VS 2008
  Integrated bdist_wininst into PCBuild9 directory
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  r59621 | christian.heimes | 2007-12-31 15:51:18 +0100 (Mon, 31 Dec 2007) | 1 line

  Moved PCbuild directory to PC/VS7.1
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  r59622 | christian.heimes | 2007-12-31 15:59:26 +0100 (Mon, 31 Dec 2007) | 1 line

  Fix paths for build bot
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  r59623 | christian.heimes | 2007-12-31 16:02:41 +0100 (Mon, 31 Dec 2007) | 1 line

  Fix paths for build bot, part 2
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  r59624 | christian.heimes | 2007-12-31 16:18:55 +0100 (Mon, 31 Dec 2007) | 1 line

  Renamed PCBuild9 directory to PCBuild
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1 files changed, 9 insertions, 7 deletions

diff --git a/Doc/library/constants.rst b/Doc/library/constants.rst
index 0d44b7babb..387087417e 100644
--- a/Doc/library/constants.rst
+++ b/Doc/library/constants.rst
@@ -15,19 +15,21 @@ A small number of constants live in the built-in namespace.  They are:
 
 .. data:: False
 
-   The false value of the :class:`bool` type.
+   The false value of the :class:`bool` type. Assignments to ``False`` 
+   are illegal and raise a :exc:`SyntaxError`.
 
 
 .. data:: True
 
-   The true value of the :class:`bool` type.
+   The true value of the :class:`bool` type. Assignments to ``True`` 
+   are illegal and raise a :exc:`SyntaxError`.
 
 
 .. data:: None
 
    The sole value of :attr:`types.NoneType`.  ``None`` is frequently used to
    represent the absence of a value, as when default arguments are not passed to a
-   function.
+   function. Assignments to ``None`` are illegal and raise a :exc:`SyntaxError`.
 
 
 .. data:: NotImplemented
@@ -42,11 +44,11 @@ A small number of constants live in the built-in namespace.  They are:
    The same as ``...``. Special value used mostly in conjunction with extended
    slicing syntax for user-defined container data types, as in ::
 
-      val = container[1:5, 7:10, ...]
+   .. XXX Someone who understands extended slicing should fill in here.
 
 
 .. data:: __debug__
 
-   A boolean value that is :data:`True` if Python was not started with the
-   ``-O`` command line option.  Its value is used indirectly by the
-   :keyword:`assert` statement, but it can also be used directly in code.
+   This constant is true if Python was not started with an :option:`-O` option.
+   Assignments to :const:`__debug__` are illegal and raise a :exc:`SyntaxError`.
+   See also the :keyword:`assert` statement.