Apparently-legal casing exception is rejected

Using GNATPP Community 24.0.0, the casing exception
```
*xia_parser*
```
is rejected:
```
/Users/simon/.emacs_ts_ada_case_exceptions:116:2: wrong syntax of a casing exception, line ignored
```

Mind you, I am guessing at what the proper syntax of a casing exception is, since I don’t see it specified anywhere?