Variable setTabEvery8Columns`Const`

setTabEvery8Columns: "\u001b[?5W" = "\x1b[?5W"

setTabEvery8Columns (DECST8C) sets the tab stops at every 8 columns.

```
CSI ? 5 W
```

See

https://vt100.net/docs/vt510-rm/DECST8C.html