[css-writing-modes] updated for newer draft of UTR#50

Author: Koji Ishii

css-writing-modes/Overview.src.html

@@ -1355,10 +1355,10 @@ <h4 id='vertical-orientations'>
 Mixed Vertical Orientations</h4>
 
   <p>
-    [[!UTR50]] defines a property for the default character orientation of mixed-orientation vertical text.
+    [[!UTR50]] defines the Vertical_Orientation property for the default character orientation of mixed-orientation vertical text.
     When 'text-orientation' is ''mixed'',
     the UA must render a <i>character</i> upright if its orientation property is
-    <code>U</code>, <code>T</code>, or <code>Tu</code>;
+    <code>U</code>, <code>Tx</code>, or <code>Tu</code>;
     or <a href="#typeset-sideways">typeset it sideways</a> (90&deg; clockwise from horizontal)
     if its orientation property is <code>R</code>.
     For <code>Tr</code> <i>characters</i>,
@@ -1377,14 +1377,6 @@ <h4 id='vertical-orientations'>
     and the "upright" orientation of the glyphs of these scripts
     in most OpenType fonts (which assume horizontal typesetting)
     don't match.
-
-  <p class='issue'>
-    As of the time of publication,
-    Unicode has not yet officially updated its orientation data to account for the many errata that were accepted in June 2012.
-    Therefore, the official UTR50 data (version 5) should not be used.
-    (Instead, see <a href="http://www.unicode.org/reports/tr50/tr50-6.Orientation.txt">this draft of version 6</a>.)
-    When Unicode publishes a proper update,
-    this spec will update its references accordingly.
 
 <h4 id='vertical-font-features'>
 Vertical Typesetting and Font Features</h4>
@@ -1413,7 +1405,7 @@ <h4 id='vertical-font-features'>
         but Western fonts typically lack any vertical typesetting features.)
         Unicode published draft data on which <i>characters</i> should appear sideways
         as the SVO property in <a href="http://www.unicode.org/reports/tr50/tr50-6.Orientation.txt">this data file</a>;
-        however, this property has been abandoned for future revisions of [[!UTR50]].
+        however, this property has been abandoned for the current revision of [[!UTR50]].
     <dt id='typeset-sideways'>sideways characters 
     <dd>
       Are typeset rotated 90&deg; sideways with horizontal metrics,