Function usage_error

tools/code_to_raw.cpp:16–23

void usage_error(char *name) {
  std::cerr << "Usage: " << name
            << " --protocol PROTOCOL_NAME"
            << " --code <hexidecimal>"
            << " [--bits 1-" << kStateSizeMax * 8 << "]"
            << " [--timinginfo]"
            << std::endl;
}

int main(int argc, char *argv[]) {
  int argv_offset = 1;