message: Update dataframe_tester.cc
  Fixed typo
diff: @@ -2133,7 +2133,7 @@ int main(int argc, char *argv[]) {
  {
  // Testing gen_datetime_index()
  // I am commenting some of these out because with timezone spec,
  - // it will take tool long for the test to run
  + // it will take too long for the test to run
  std::vector<unsigned long> idx_vec1 =
  MyDataFrame::gen_datetime_index("01/01/2018",
  