message: removed newline after return
diff: const indent = new Array((options.indent || 0) + 1).join(' ');
  const nl = options.indent ? '\n' : '';
  - const result = convert2Dto3D<string, string>(to2D, to3D, scriptUnion, modelToExport, options);
  + const result = convert2Dto3D<string, string>(to2D, to3D, scriptUnion, modelToExport, options).trim();
  return `function ${options.functionName || 'main'}(){${wrap(`return ${result};`)}}${nl}`;
  }
  