[Python-Dev] Switching re and sre

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