Less typing and less cycles than join(QString) where appropriate
Change-Id: I6ebc0e17e4d7fd9845864dd95b7de4ba4dad6906
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
(cherry picked from qtcreator/6431ab2c799553623ec3fe6a79f1e85484558dd6)
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>