http://unicode.org/versions/corrigendum6.html:
> in Unicode 5.0, the list of characters with the Bidi_Mirrored property
> was made consistent for brackets and quotation marks, in preparation for
> new constraints on bidi mirroring. However, after publication of
> Unicode 5.0.0 it was discovered that this change adversely affected
> several quotation mark characters in deployed data.
Task-number: QTBUG-25169
Change-Id: Id49caf401af2d5a1e6dbcc32b2f350aa20b7f901
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
73b24486ed