[css-writing-modes] Sync L3 & L4.

Author: fantasai

css-writing-modes-3/Overview.bs

@@ -689,17 +689,17 @@ Reordering-induced Box Fragmentation</h4>
   <p class="note">The 'box-decoration-break' property can override this behavior
   to draw box decorations on both sides of each fragment. [[!CSS3-BREAK]]
 
-<h2 id="vertical-intro">
-Introduction to Vertical Text</h2>
+<h2 id="vertical-modes">
+Vertical Writing Modes</h2>
 
   <p>In addition to extensions to CSS2.1&rsquo;s support for bidirectional text,
     this module introduces the rules and properties needed to support vertical
     text layout in CSS.
 
-<h3 id="vertical-examples">
-Vertical Text Examples</h3>
+<h3 id="vertical-intro">
+Introduction to Vertical Writing</h3>
 
-  <p><em>This section is non-normative.</em></p>
+  <p><em>This subsection is non-normative.</em></p>
 
   <p>Unlike languages that use the Latin script which are primarily laid out
     horizontally, Asian languages such as Chinese and Japanese can be laid out
@@ -873,12 +873,13 @@ Block Flow Direction: the 'writing-mode' property</h3>
             src="images/vertical-form.png"></p>
   </div>
 
-  <p>If a box has a different 'writing-mode' value than its containing block:
+  <p>If a box has a different 'writing-mode' value than its parent box
+    (i.e. nearest ancestor without ''display: contents''):
   <ul>
-   <li>If the box has a specified 'display' of ''display/inline'',
-     its 'display' computes to ''inline-block''. [[!CSS21]]
-   <li>If the box is a block container, then it establishes a new block
-     formatting context.
+   <li>If the box would otherwise become an in-flow box with a computed 'display' of ''inline'',
+     its 'display' computes instead to ''inline-block''.
+   <li>If the box is a block container,
+     then it establishes a new block formatting context.
    <li>More generally, if its specified <a>inner display type</a> is ''flow'',
      then its computed <a>inner display type</a> becomes ''flow-root''. [[!CSS-DISPLAY-3]]
   </ul>

css-writing-modes/Overview.bs

@@ -692,15 +692,18 @@ Reordering-induced Box Fragmentation</h4>
   <p class="note">The 'box-decoration-break' property can override this behavior
   to draw box decorations on both sides of each fragment. [[!CSS3-BREAK]]
 
-<h2 id="vertical-intro">
-Introduction to Vertical Text</h2>
-
-  <p><em>This subsection is non-normative.</em></p>
+<h2 id="vertical-modes">
+Vertical Writing Modes</h2>
 
   <p>In addition to extensions to CSS2.1&rsquo;s support for bidirectional text,
     this module introduces the rules and properties needed to support vertical
     text layout in CSS.
 
+<h3 id="vertical-intro">
+Introduction to Vertical Writing</h3>
+
+  <p><em>This subsection is non-normative.</em></p>
+
   <p>Unlike languages that use the Latin script which are primarily laid out
     horizontally, Asian languages such as Chinese and Japanese can be laid out
     vertically.  The Japanese example below shows the same text laid out
@@ -2045,7 +2048,7 @@ Available Space in Orthogonal Flows</h4>
     and <i>inline axis</i> computations cannot be resolved.
     In these cases, the initial containing block's size is used
     as a <i>fallback</i> variable in place of the <i>available inline space</i>
-    for calculations that require a definite <i>available inline size</i>.
+    for calculations that require a definite <i>available inline space</i>.
 
   <p>See [[!CSS3-SIZING]] for further details on CSS sizing terminology and concepts.
 
@@ -2680,6 +2683,12 @@ Full-width Characters</h5>
     can potentially affect the selection of variants for characters included in combined text runs.
     Authors are advised to use these properties with care when 'text-combine-upright' is also used.
 
+Privacy and Security Considerations {#priv-sec}
+===============================================
+
+	This specification introduces no new privacy leaks,
+	or security considerations beyond “implement it correctly”.
+
 <h2 class="no-num" id="changes">Changes</h2>
 <!--
   <h3 class="no-num" id="changes-201311">
@@ -2720,12 +2729,16 @@ Ken Lunde,
 Shunsuke Matsuki,
 Nat McCully, Eric Muller,
 Paul Nelson, Kenzou Onozawa,
+Chris Pratley,
 Xidorn Quan,
 Dwayne Robinson,
 Simon Sapin,
+Marcin Sawicki,
 Dirk Schulze,
 Hajime Shiozawa,
+Alan Stearns,
 Michel Suignard,
+Takao Suzuki,
 Gérard Talbot,
 Masataka Yakura,
 Taro Yamamoto,