util: subclass deque for Python 2.4 backwards compatibility
It turns out that Python 2.4's deque type is lacking a remove method.
We can't implement remove in terms of find, because it doesn't have
find either.
#!/usr/bin/env python
# Filter output by the progress extension to make it readable in tests
import sys, re
for line in sys.stdin:
line = re.sub(r'\r+[^\n]', lambda m: '\n' + m.group()[-1:], line)
sys.stdout.write(line)
print