Feature Request: config.json shortname warning

[ben-burns]

I accidentally added a space in my shortname, and it resulted in sox errors likely due to the spaces in the file path inside of combine_wave().

Is it possible to either warn about the space in config.json's shortname or add double quotes around each file path in combine_wave() to help mitigate errors in the event of an accidental space in the shortname?

Something like this in combine_wave() before nchars may help:

// Add double quotes around each file path in the files string
std::ostringstream quoted_files;
size_t pos = 0;
while ((pos = files.find(' ')) != std::string::npos) {
    quoted_files << "\"" << files.substr(0, pos) << "\" ";
    files.erase(0, pos + 1);
}
quoted_files << "\"" << files << "\""; // Add the last file