Fix representation

It might be just me, but with `unless` it sounds like **if you want to use your forms in multiple places you should define it in your controllers**.


| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets |
I think the original is more clear, but I see your point. How about:

```rst
And if you don't need to reuse the form in multiple places, that's totally fine.
```