Qt 5 compatibility docs incorrect on equivalency of old QGraphicsItem::rotate()

The compatibility docs for QGraphicsItem::rotate() state that the equivalent of the old rotate() method is:

setRotation(rotation() + angle);

This is not correct. Rotation done using setRotation() does not combine with transformations. The old rotate() did combine with existing transformations.

The proper equivalent of

item->rotate(angle);

is

item->setTransform(QTransform().rotate(angle), true);