[Csv] Something's fishy w/ Mac line endings...

[Skip Montanaro]

    >> There seems to be a problem with what it expects to see after the \r
    >> character.  It wants to see either a NUL or a \n followed by a NUL.
    >> In this case, it sees the '0' which starts the next line.

    Andrew> I wonder if it's a unicode issue?

Shouldn't be.  The test case the submitter posted only uses ASCII.

Looking at the problem a bit, I see this call chain:

    Reader_iternext ->
        PyIter_Next ->
            file_iternext ->
                readahead_get_line_skip

readahead_get_line_skip notes the presence of \n and NUL terminates the line
it returns, but not the presense of \r.

I see one of two possible solutions:

    1. See if readahead_get_line_skip should special-case \r when not
       followed by \n.  I think this may be the "most correct" approach.

    2. Change Reader_iternext to not rely on a NUL following the putative
       end-of-line character.

Skip