correct summary of bidi changes

Author: fantasai

css3-writing-modes/Overview.html

@@ -3421,10 +3421,8 @@ <h3 class=no-num id=recent-changes> Changes from the <a
     class=css>isolate bidi-override</code>’ with single keyword ‘<a
     href="#isolate-override"><code class=css>isolate-override</code></a>’.
 
-   <li>Reworked bidi isolation slightly to better accommodate the possible
-    addition of isolation codes to Unicode bidi: paragraph determination for
-    isolated content is now performed per-paragraph, rather than per-element.
-    
+   <li>Clarified that bidi isolated content does not affect plaintext
+    heuristics of the containing paragraph.
 
    <li>Added data tables for orientation of characters in Unicode.
 

css3-writing-modes/Overview.src.html

@@ -2538,8 +2538,7 @@ <h3 class="no-num" id="recent-changes">
   <p>Major changes include:</p>
   <ul>
     <li>Replaced 'unicode-bidi' value of ''isolate bidi-override'' with single keyword ''isolate-override''.
-    <li>Reworked bidi isolation slightly to better accommodate the possible addition of isolation codes to Unicode bidi:
-      paragraph determination for isolated content is now performed per-paragraph, rather than per-element.
+    <li>Clarified that bidi isolated content does not affect plaintext heuristics of the containing paragraph.
     <li>Added data tables for orientation of characters in Unicode.
     <li>Replaced <i>before</i> with <i>head</i> and <i>after</i> with <i>foot</i>.
   </ul>