Finding form by name doesn't work

I'm trying to find a form by name rather than other attributes. Guessing from documentation / examples, I expected this to work:
```
browser.get_form(name='some_name')
```
But that explodes with:
```
File ".../lib/python3.6/site-packages/robobrowser/browser.py", line 293, in get_form
form = self.find(_form_ptn, *args, **kwargs)
TypeError: find() got multiple values for argument 'name'
```