fix minor typo (#8626)

Author: taajik

docs/api-guide/generic-views.md

@@ -65,7 +65,7 @@ The following attributes control the basic view behavior.
 
 * `queryset` - The queryset that should be used for returning objects from this view.  Typically, you must either set this attribute, or override the `get_queryset()` method. If you are overriding a view method, it is important that you call `get_queryset()` instead of accessing this property directly, as `queryset` will get evaluated once, and those results will be cached for all subsequent requests.
 * `serializer_class` - The serializer class that should be used for validating and deserializing input, and for serializing output.  Typically, you must either set this attribute, or override the `get_serializer_class()` method.
-* `lookup_field` - The model field that should be used to for performing object lookup of individual model instances.  Defaults to `'pk'`.  Note that when using hyperlinked APIs you'll need to ensure that *both* the API views *and* the serializer classes set the lookup fields if you need to use a custom value.
+* `lookup_field` - The model field that should be used for performing object lookup of individual model instances.  Defaults to `'pk'`.  Note that when using hyperlinked APIs you'll need to ensure that *both* the API views *and* the serializer classes set the lookup fields if you need to use a custom value.
 * `lookup_url_kwarg` - The URL keyword argument that should be used for object lookup.  The URL conf should include a keyword argument corresponding to this value.  If unset this defaults to using the same value as `lookup_field`.
 
 **Pagination**:
@@ -217,7 +217,7 @@ If the request data provided for creating the object was invalid, a `400 Bad Req
 
 Provides a `.retrieve(request, *args, **kwargs)` method, that implements returning an existing model instance in a response.
 
-If an object can be retrieved this returns a `200 OK` response, with a serialized representation of the object as the body of the response.  Otherwise it will return a `404 Not Found`.
+If an object can be retrieved this returns a `200 OK` response, with a serialized representation of the object as the body of the response.  Otherwise, it will return a `404 Not Found`.
 
 ## UpdateModelMixin
 
@@ -395,4 +395,4 @@ The following third party packages provide additional generic view implementatio
 [UpdateModelMixin]: #updatemodelmixin
 [DestroyModelMixin]: #destroymodelmixin
 [django-rest-multiple-models]: https://github.com/MattBroach/DjangoRestMultipleModels
-[django-docs-select-related]: https://docs.djangoproject.com/en/3.1/ref/models/querysets/#django.db.models.query.QuerySet.select_related
+[django-docs-select-related]: https://docs.djangoproject.com/en/3.1/ref/models/querysets/#django.db.models.query.QuerySet.select_related