In Python 2.x the bytes literal b'...' is actually an alias for '...'
More descriptive error for TODO items
Improve module RE
Improve module _codecs
Improve module itertools
Implement collections.deque
Improve module marshall
Improve module _md5
Improve SHA modules
Fix opening files to read bytes, not chars
Fix invalid use of #1= (reported by Pascal J. Bourguignon)