Function parseFlag

test/doctest.h:6525–6527

locates a flag on the command line

    // locates a flag on the command line
    bool parseFlag(int argc, const char* const* argv, const char* pattern) {
        return parseOption(argc, argv, pattern);
    }

    // parses a comma separated list of words after a pattern in one of the arguments in argv
    bool parseCommaSepArgs(int argc, const char* const* argv, const char* pattern,