regexp matching question

[Peter]

>> You are not going to like this but I made progess with my customized
>> formail replacement:
>
>  What's not to like?  I agree that formail runs into trouble
> occasionally, and a more specialized tool can do a better job in a
> specific area.

We agree then. Could you please tell if the sed example works in your 
sed version ?

echo -e "a\na"|sed -e '/\n/M s/.\+/yes/g'

fails here. Thanks,

Peter
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