lightning failed with EOF error when the last char in csv file is not \r\n

[glorv]

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.
   use lightning local backend to load csv files that don't end with \r\n at the last line and set strict-format = true

2. What did you expect to see?
   Lightning should success.

3. What did you see instead?
   Error: restore table db.tbl failed: EOF
   tidb lightning encountered error: restore table db.tbl failed: EOF

4. What version of BR and TiDB/TiKV/PD are you using?
   nightly

5. Operation logs

6. Configuration of the cluster and the task

7. Screenshot/exported-PDF of Grafana dashboard or metrics' graph in Prometheus if possible