[css-display] Markup tweaks.

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extra : rebase_source : 20ea8436d7e3fac2787430c9e037afd98f2af13c
biblio.ref Unicode 6.3 update

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extra : rebase_source : 10ca8ec71813d38ae7f7db0dbf6b34b9118ad526
[css-writing-modes] The maximum embedding level is wrong <http://www.w3.org/mid/CEA027B2.49FD%25igor.o@samsung.com>

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extra : rebase_source : 9dda9bdb97c370114e849c081a08c58d6b2c5143