Form class name for make:form is broken

https://github.com/symfony/maker-bundle/pull/1685 introduced a small "bug".

Running the maker for a form `make:form`.

```
symfony console make:form
```

Results in:

```
The name of the form class (e.g. 0.000000orm):
```

Expected:

```
The name of the form class (e.g. OrangePizzaForm):
```