Fredrik> s = s.replace("\r", "\n"["\n" in s:])
This fails on admittedly weird strings that mix line endings:
>>> s = "abc\rdef\r\n"
>>> s = s.replace("\r", "\n"["\n" in s:])
>>> s
'abcdef\n'
where universal newline mode or Just's re.sub() gadget would work.
Skip
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Just van Rossum wrote:
> I don't think that in general you want to fold multiple empty lines into
> one. This would be my prefered regex:
>
>s = re.sub(r"\r\n?", "\n", s)
>
> Catches both DOS and old-style Mac line endings. Alternatively, you can
> use s.splitlines():
>
>s = "\n".join(s.sp
