[Cython] cython-0.23 monkey-patches stdlib?

[Neal Becker]

According to
https://github.com/cython/cython/blob/master/CHANGES.rst

the default build would attempt to modify python stdlib files?

How would this work on distributions?  I am maintainer for Cython on Fedora.  
So installing Cython would try to overwrite stdlib files?  That sounds 
difficult.  For one thing, it means more than 1 package would own the same 
files.  And I don't know if the general user community would like this 
approach.