fix grammar error

Author: fantasai

css3-writing-modes/Overview.html

@@ -32,15 +32,15 @@
 
    <h1>CSS Writing Modes Module Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 23 June 2012</h2>
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 25 June 2012</h2>
 
    <dl>
     <dt>This version:
 
     <dd><a
      href="http://dev.w3.org/csswg/css3-writing-modes/">http://dev.w3.org/csswg/css3-writing-modes/</a>
      <!--
-    <dd><a href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20120623/">http://www.w3.org/TR/2012/ED-css3-writing-modes-20120623/</a>
+    <dd><a href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20120625/">http://www.w3.org/TR/2012/ED-css3-writing-modes-20120625/</a>
 -->
 
 
@@ -1900,9 +1900,9 @@ <h4 id=vertical-orientations><span class=secno>5.1.1. </span> Vertical
     href="#upright"><code class=css>upright</code></a>’.
   </dl>
 
-  <p>The UA should render a <a href="#character"><i>character</i></a> in
-   upright if the value is ‘<code class=css>U</code>’, or in sideways if
-   ‘<code class=css>R</code>’.
+  <p>The UA must render a <a href="#character"><i>character</i></a> upright
+   if the value is ‘<code class=css>U</code>’, or sideways (90°
+   clockwise from horizontal) if ‘<code class=css>R</code>’.
 
   <div class=note>These two properties are derived properties using the
    pseudo-algorithm shown below:

css3-writing-modes/Overview.src.html

@@ -1328,8 +1328,8 @@ <h4 id=vertical-orientations>
     <dt><dfn>SVOsimple</dfn></dt>
     <dd>This property defines character orientations for ''upright''.</dd>
   </dl>
-  <p>The UA should render a <i>character</i> in upright if the value is ''U'',
-    or in sideways if ''R''.</p>
+  <p>The UA must render a <i>character</i> upright if the value is ''U'',
+    or sideways (90&deg; clockwise from horizontal) if ''R''.</p>
   <div class="note">These two properties are derived properties
     using the pseudo-algorithm shown below:
     <pre>