Thanks, Stephane, for diagnosing the problem. Closing the bug.
- bug#21989: grep search by ASCII code unsuccessful Shivanshu Goyal
- bug#21989: grep search by ASCII code unsuccessful Stephane Chazelas
- bug#21989: grep search by ASCII code unsuccessf... Paul Eggert
- bug#21989: grep search by ASCII code unsuccessful Shivanshu Goyal
