Matching item delimiter and decimal point (comma) messes up CSV export

[simonberger]

CSV Export creates a bad file if the defined or calculated decimal point matches the defined item delimiter.
In a change or patch some time ago you already set the default delimiter to ";" if the decimal point is "," but the it still fails if the delimiter has been defined by the user.

Codeblock
https://github.com/highcharts/highcharts/blob/master/js/modules/export-data.src.js#L496

Unimportant optimization but I noted there can be a if / else if on this type checking too.

[pawelfus]

Hi @simonberger

Thank you for reporting the issues. You most probably refer to #7448 issue. Could you explain the case a bit more? You mean, you set manually exporting.csv.itemDelimiter to , and now it can break exported CSV's?

[simonberger]

@pawelfus
Yes that looks like the issue to this fix I saw.
But as described it fixes just the default behaviour. If I force the usage of a comma it is still broken.
I modified the example of your linked issue to demonstrate the problem.

http://jsfiddle.net/3hgd5hu2/1/

Quotes has to be added to those columns. For example like this simonberger/export-csv@8a21717