First merge from the trunk straight into the py3k branch. I'm not

using the message generated by svnmerge, because it contains a lot of
stuff about the Doc tree, which I'm not merging this time due to the
way the Doc tree was initially added.  I am however adding roman.py
which was added later to Doc/tools.  I'll try to diff the two Doc
trees separately to see if there's stuff I missed.

Lib/decimal.py

@@ -612,7 +612,8 @@ class Decimal(object):
             except ValueError:
                 self._is_special = True
                 self._sign, self._int, self._exp = \
-                                        context._raise_error(ConversionSyntax)
+                              context._raise_error(ConversionSyntax,
+                                  "Invalid literal for Decimal: %r" % value)
             return self
 
         raise TypeError("Cannot convert %r to Decimal" % value)