relax SVN archive

svn+ssh://bugman@.../svn/relax/1.3

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r14103 | bugman | 2011-08-04 11:08:58 +0200 (Thu, 04 Aug 2011) | 6 lines

Fix for the RelaxWarning system on Mac OS X, the base class __str__ method now returns a simple string.

On a Mac, the warning message text was in unicode whereas the __str__() method must return a standard
string. So now __str__() is using the str() method to convert.
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