Fixed slightly corrupted error message
@@ -1861,7 +1861,7 @@ def columns_from_model(cls, columns, **kwargs):
)
def _from_model(cls, *, rows=None, model=None, columns=None, include=None, exclude=None):
assert rows is None or isinstance(rows, QuerySet), \
- 'auto__rows needs to be a QuerySet for column generation to work' \
+ 'auto__rows needs to be a QuerySet for column generation to work. ' \
'If it needs to be a lambda, provide a model with auto__model for column generation, ' \
'and pass the lambda as rows.'
