Argh, gen the spec.

Author: tabatkins

css3-flexbox/Overview.html

@@ -30,11 +30,11 @@
 
    <h1 id=head-box-flexible>CSS Flexible Box Layout Module</h1>
 
-   <h2 class="no-num no-toc" id=w3c-working>Editor's Draft, 14 May 2012</h2>
+   <h2 class="no-num no-toc" id=w3c-working>Editor's Draft, 15 May 2012</h2>
 
    <dl>
     <dt>This version:
-     <!--<dd><a href="http://www.w3.org/TR/2012/ED-css3-flexbox-20120514/">http://www.w3.org/TR/2012/WD-css3-flexbox-20120514/</a>-->
+     <!--<dd><a href="http://www.w3.org/TR/2012/ED-css3-flexbox-20120515/">http://www.w3.org/TR/2012/WD-css3-flexbox-20120515/</a>-->
 
 
     <dd><a
@@ -2383,7 +2383,13 @@ <h3 id=cross-sizing><span class=secno>9.4. </span> Cross size determination</h3>
 
   <ol start=8>
    <li id=algo-cross-line> <strong>Calculate the cross size of each flexbox
-    line.</strong> For each flexbox line:
+    line.</strong>
+    <p> If the flexbox has only a single line (even if it's a <a
+     href="#multi-line0"><i>multi-line</i></a> flexbox), the cross size of
+     the flexbox line is the flexbox's inner cross size.
+
+    <p> Otherwise, for each flexbox line:
+
     <ol>
      <li> Collect all the flexbox items whose inline-axis is parallel to the
       main-axis, whose ‘<a href="#flex-item-align"><code