Update cabinets and document_index api views docstrings. Update multi level docstrings as per Python best practices.

Signed-off-by: Michael Price <loneviking72@gmail.com>

mayan/apps/documents/api_views.py

@@ -381,7 +381,6 @@ class APIDocumentTypeDocumentListView(generics.ListAPIView):
     """
     Returns a list of all the documents of a particular document type.
     """
-
     filter_backends = (MayanObjectPermissionsFilter,)
     mayan_object_permissions = {'GET': (permission_document_view,)}
     serializer_class = DocumentSerializer

mayan/apps/documents/forms.py

@@ -166,7 +166,6 @@ class DocumentTypeSelectForm(forms.Form):
     Form to select the document type of a document to be created, used
     as form #1 in the document creation wizard
     """
-
     def __init__(self, *args, **kwargs):
         user = kwargs.pop('user', None)
         logger.debug('user: %s', user)

mayan/apps/documents/models.py

@@ -154,7 +154,6 @@ class Document(models.Model):
     generated for each document. No two documents can ever have the same UUID.
     This ID is generated automatically.
     """
-
     uuid = models.UUIDField(default=uuid.uuid4, editable=False)
     document_type = models.ForeignKey(
         DocumentType, on_delete=models.CASCADE, related_name='documents',

mayan/apps/documents/tests/test_models.py

@@ -119,7 +119,6 @@ class DocumentTestCase(BaseTestCase):
         Test document type trashing policies. Documents are moved to the
         trash, x amount of time after being uploaded
         """
-
         self.document_type.trash_time_period = 1
         # 'seconds' is not a choice via the model, used here for convenience
         self.document_type.trash_time_unit = 'seconds'
@@ -142,7 +141,6 @@ class DocumentTestCase(BaseTestCase):
         Test document type deletion policies. Documents are deleted from the
         trash, x amount of time after being trashed
         """
-
         self.document_type.delete_time_period = 1
         # 'seconds' is not a choice via the model, used here for convenience
         self.document_type.delete_time_unit = 'seconds'