Fixed typo in docs/topics/db/aggregation.txt.
@@ -70,7 +70,7 @@ In a hurry? Here's how to do common aggregate queries, assuming the models above
# Difference between the highest priced book and the average price of all books.
>>> from django.db.models import FloatField
>>> Book.objects.aggregate(
- ... price_diff=Max('price', output_field=FloatField()) - Avg('price')))
+ ... price_diff=Max('price', output_field=FloatField()) - Avg('price'))
{'price_diff': 46.85}
# All the following queries involve traversing the Book<->Publisher
