Defaults set for an OptionGroup or for options inside an OptionGroup were not taken into account.
Defaults set for an OptionGroup or for options inside an OptionGroup were not taken into account.

weisslj/cpp-optparse,weisslj/cpp-argparse,dm0/cpp-argparse,weisslj/cpp-optparse,dm0/cpp-argparse,dm0/cpp-argparse,weisslj/cpp-optparse,weisslj/cpp-argparse,weisslj/cpp-argparse