[Python-Dev] Switching re and sre

[A.M. Kuchling]

FYI: In a discussion on the Python security response list, Guido
suggested that the sre.py and re.py modules should be switched.

Currently re.py just imports the contents of sre.py -- once it
supported both sre and the PCRE-based pre.py -- and sre.py contains
the actual code.

Now that pre.py is gone, we can move the actual code into re.py and
make sre.py just import re.py, so that any user code that actually
imports sre will still work.  I'll make this change today.

--amk