message: change log output to not trigger log parser error
diff: @@ -36,8 +36,8 @@ struct VoxelEvaluationDetails {
  << " num overlapping voxels: " << num_overlapping_voxels << "\n"
  << " num non-overlapping voxels: " << num_non_overlapping_voxels << "\n"
  << " num ignored voxels: " << num_ignored_voxels << "\n"
  - << " min error: " << min_error << "\n"
  - << " max error: " << max_error << "\n"
  + << " min-error: " << min_error << "\n"
  + << " max-error: " << max_error << "\n"
  << " RMSE: " << rmse << "\n"
  << "========================================\n";
  return ss.str();
  