Troubles with CSV file

[Skip Montanaro]

    Dennis>         ""read this, man"", 1
    Dennis> start---|
    Dennis> end------|                        ie, an empty quoted string
    Dennis> unquoted--^^^^^^^^^
    Dennis> comma-split--------|
    Dennis> unquoted------------^^^^
    Dennis> start-------------------|
    Dennis> end----------------------|        another empty quoted string
    Dennis> comma-split---------------|
    Dennis> unquoted-------------------^^

I'm not sure what "correct" interpretation of this should be since no
separator was placed after the first '""' and before the second.  Given that
the input is ill-defined, just about any output could be considered
"valid". ;-)

Skip