docs: Fix simple typo, unmutable -> immutable
There is a small typo in src/oscar/apps/dashboard/orders/forms.py.
Should read `immutable` rather than `unmutable`.
@@ -108,7 +108,7 @@ class OrderSearchForm(forms.Form):
if data:
if data.get('response_format', None) not in self.format_choices:
- # Handle POST/GET dictionaries, which are unmutable.
+ # Handle POST/GET dictionaries, which are immutable.
if isinstance(data, QueryDict):
data = data.dict()
data['response_format'] = 'html'
