Improvement on dateformat

[larskristianhaga]

We just stumbled upon an issue with the dateformat when trying to parse the date value with the dateformat result.

Here is an complete example:

Instead of the parser giving out YYYYMMDD, that is not usable directly should it not give out yyyyMMdd instead? The latter is parseable with eg DateTimeFormatter

[zach-m]

well, I guess the people from EDItEUR that maintain the Onix standard do not concern themselves with how DateTimeFormatter expects to find the format.. they use their own interpretation of data-time format. Your code needs to transform their format into Java's. If you do that, that could be a nice contribution to Jonix as a utility function.