Simon Josefsson <jas@extundo.com> writes:

>> '>' may appear at the beginning of a line accidently, and we certainly
>> want to supply the space character in this case.
> 
> First, wouldn't it be very complicated to solve your case?

No, I don't think so.  I think it helps to consider a leading '>' to
be a quote character only if the preceding line is empty (or consists
entirely of whitespace), or if it starts in turn with a '>'.

I've just implemented this logic (at least I think so).  The diff is a
bit more complicated then it needs to be, but if you don't like this
implementation, I'm going to add some backtracking code which should
do somewhat better.