Unwanted line break after `whenever oserror` breaks code

The formatter result of

```sql
whenever sqlerror exit failure
whenever oserror exit failure
select * from dual;
```

is 

```sql
whenever sqlerror exit failure
whenever oserror
exit failure
select * from dual;
```

Afterwards, the code is not executable anymore, because SQL*Plus commands need a continuation character for multiline commands since a command, ends with EOL.