Why unit tests are good for you (or at least for your code)
Old version of pymarkdown:
Ran 75 tests in 0.349s
FAILED (failures=57, errors=2)
Ouch.
New version of pymarkdown:
Ran 75 tests in 0.450s
OK
New version of pymarkdown available from http://err.no/pymarkdown/ or my arch repository