Document changes about default arguments

Author: iMichka

docs/history.rst

@@ -35,13 +35,17 @@ Version 1.7.3 (not yet released)
    The two declarations are now hidden from the declarations tree, but can still
    be generated by using the ``config.flags = ["f1"]`` option.
 
-7. Remove unittest2 dependency for testing with python 2.6
+7. Multiple fixes to adapt default arguments in functions for py++. Using the
+   latest version of CastXML is recommended. This makes sure default arguments
+   for function parameters are correctly defined, so that py++ can process them.
 
-8. Testing: test with std::tr1 unordered containers for gcc >= 4.4.7 and castxml
+8. Remove unittest2 dependency for testing with python 2.6
 
-9. Cosmetic fix for generator name printed to stdout when launching unit tests
+9. Testing: test with std::tr1 unordered containers for gcc >= 4.4.7 and castxml
 
-10. Fix simple typo in example.py comment
+10. Cosmetic fix for generator name printed to stdout when launching unit tests
+
+11. Fix simple typo in example.py comment
 
 Thanks to the following people for their contribution to this release:
 Mark Moll, Ashish Sadanandan, Mark Oates