StringBuilder has deprecated support for char[], using wide string will
also avoid run-time unicode conversions.
Change-Id: Iff865463fb255acfa55224393807ece9ecb818b4
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
Reviewed-by: Hatem ElKharashy <hatem.elkharashy@qt.io>
(cherry picked from commit d86224250322550169dd72bb04987a73aca74e69)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>