tests/sitecustomize.py

doc: update copyright years to 2012

I sometimes look at a piece of software and if the man page says
"Copyright 2004", then I'm inclined to think that the project is stale
or that the authors are lazy. Neither is good publicity for us :-)

try:
    import coverage
    getattr(coverage, 'process_startup', lambda: None)()
except ImportError:
    pass