code: function buildCliArg(prop) {
    var cliArg = '--' + prop;
    while (cliArg.indexOf("_") !== -1) {
      cliArg = cliArg.replace('_', '-');
    }
    return cliArg;
  }
docs: Convert a property like 'with_xunit' to cli-arg style '--with-xunit'