Fields containing only the letter 'A' are parsed as dates

[ThrawnCA]

DateUtil thinks that it can interpret the letter 'A' as a date (the current day). Possibly it is treating it as an abbreviation of 'AM'?

We have data containing single-character fields, including the letter A, so this is causing us problems.

One possible fix is to give types.DateUtilType a 'test' function:

    def test(self, value):
        if len(value) == 1:
            return False
        return CellType.test(self, value)

[ThrawnCA]

This is obsolete.