The output of our tooling is wrong on the use of `.` instead of `#`

E.g. 

```
## Grid

SOL..
THEME
AIMED
ROUGE
..RAN
```

should be:

```
## Grid

SOL##
THEME
AIMED
ROUGE
##RAN
```

According to the actual spec

Not sure this was a conscious choice, but we're 4 years down the line of this and it's probably not possible to go back. We could add a compat layer, but there are no other consumers so no-one has raised an issue