Ticket #10039: aggdocs.diff

docs/topics/db/aggregation.txt

@@ -105 +105 @@
 will be annotated with the specified values.
 
 The syntax for these annotations is identical to that used for the
-``aggregate()`` clause. Each argument to ``annotate()`` describes and
-aggregate that is to be calculated. For example, to annotate Books with
-the number of authors::
+``aggregate()`` clause. Each argument to ``annotate()`` describes an aggregate
+that is to be calculated. For example, to annotate Books with the number of
+authors::
 
     # Build an annotated queryset
     >>> q = Book.objects.annotate(Count('authors'))