Documentation QObject::connect(sender, F, context, F, type) misses default value for type

http://qt-project.org/doc/qt-5/qobject.html#connect-6

The function declaration should state that argument type has default value:
Qt::ConnectionType type = Qt::AutoConnection

Example code uses explicitly Qt::AutoConnection, indicating that Qt::AutoConnection must be specified.

It would be also nice to document the behavior for context == nullptr.