Final head of the former 2.0 branch

1. 9694fca Convert all remaining *simple* cases of regex usage to re usage. by Guido van Rossum · 28 years ago
2. ab096c9 New doc strings. by Guido van Rossum · 28 years ago
3. c2ef5c2 Never return a non-existing pathname. by Guido van Rossum · 34 years ago
4. bba77af Use module 'os' by Guido van Rossum · 34 years ago
5. bdfcfcc New == syntax by Guido van Rossum · 34 years ago
6. 784ca6c path.cat --> join by Guido van Rossum · 34 years ago
7. 65a9620 Initial revision by Guido van Rossum · 35 years ago