Fix algo

Author: noamr

fetch.bs

@@ -7073,7 +7073,7 @@ descendants share a quota of 384 kibibytes. That value is computed as such:
 
    <li>
     <p><a for=list>For each</a> <a>deferred fetch record</a> <var>deferredRecord</var> of
-    <var>controlDocument</var>'s <a>fetch group</a>'s
+    <var>navigable</var>'s <a for=navigable>active document</a>'s <a>fetch group</a>'s
     <a for="fetch group">deferred fetch records</a>:</p>
 
     <ol>