fixed typo in help

  err_stream->printf("\noptions:\n");

  env()->flags()->printUsage(err_stream.get());

  err_stream->printf("\nexamples:\n");

  err_stream->printf("    $ fnordmeric-server --http_port 8080 --statsd_port 8125 --datadir /tmp/fnordmetric-data\n");

  err_stream->printf("    $ fnordmetric-server --http_port 8080 --statsd_port 8125 --datadir /tmp/fnordmetric-data\n");

}

int main(int argc, const char** argv) {