Fixed -- Clarified QuerySet.bulk_update() caveat about duplicates for multiple batches.
@@ -2241,7 +2241,8 @@ them, but it has a few caveats:
``batch_size``.
* Updating fields defined on multi-table inheritance ancestors will incur an
extra query per ancestor.
-* If ``objs`` contains duplicates, only the first one is updated.
+* When an individual batch contains duplicates, only the first instance in that
+ batch will result in an update.
The ``batch_size`` parameter controls how many objects are saved in a single
query. The default is to update all objects in one batch, except for SQLite
