QString::arg(): When specifying %L1 with a number that would have a group separator in it when the default locale is set to omit the group separator then this option is ignored and it is shown anyway

QString::arg(): When specifying %L1 with a number that would have a group separator in it when the default locale is set to omit the group separator then this option is ignored and it is shown anyway

Example:

#include <QtCore>

int main(int argc, char **argv)
{
    QLocale l(QLocale::English, QLocale::UnitedKingdom);
    l.setNumberOptions(QLocale::OmitGroupSeparator);
    QLocale::setDefault(l);
    QCoreApplication ca(argc, argv);
    QString str("%L1");
    str = str.arg(5000);
    qDebug() << str;
    return 0;
}

In the example given, str should be 5000, but it is in fact 5,000. The patch attached should solve the issue.