QVersionNumber: Show type in QDebug output

To make it clearer what kind of object is being printed, and also more
consistent with the QDebug output of other classes.

Fixes: QTBUG-103085
Pick-to: 6.3
Change-Id: Ia7441dd373d359be2a87ec618684d27375a1dcf8
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/tools/qversionnumber.cpp

@@ -531,7 +531,8 @@ QDataStream& operator>>(QDataStream &in, QVersionNumber &version)
 QDebug operator<<(QDebug debug, const QVersionNumber &version)
 {
     QDebugStateSaver saver(debug);
-    debug.noquote() << version.toString();
+    debug.nospace().noquote();
+    debug << "QVersionNumber(" << version.toString() << ")";
     return debug;
 }
 #endif