source: vendor/python/2.5/Tools/scripts/crlf.py

#! /usr/bin/env python
"Replace CRLF with LF in argument files.  Print names of changed files."

import sys, os

def main():
    for filename in sys.argv[1:]:
        if os.path.isdir(filename):
            print filename, "Directory!"
            continue
        data = open(filename, "rb").read()
        if '\0' in data: