``` format = + ',' ; ``` https://invent.kde.org/kde/krita/-/blob/master/libs/odf/KoOdfNumberStyles.cpp#L456
That looks like a bug long time ago, someone wrote =+ instead of +=, then someone "fixed the coding style" by adding a space between them, then it was commented out because of a warning that suggested that this code won;t be executed, then someone uncommented it... Quite a weird situation. @Rafał, how did you find this bug? Also would you want to contribute a patch? That would be quite easy, I believe.
Okay, entire ODF code has been removed in master. I guess we should just close the report. Though I would really love to know how Rafał managed to find this bug :)