qmljsscanner did interpret ?? and ?. as a single ? and thus as the
start of a ternary operator, breaking reformatting.
Fixes: QTCREATORBUG-27344
Change-Id: I0429d20aed0196743f1c20e6ceac11351d5a7a3b
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
