Improve wording on when an embedded context is processed.

Author: gkellogg

index.html

@@ -1507,7 +1507,8 @@ <h3>Algorithm</h3>
               has been detected and processing is aborted.
               <p class="note">The result of the <a href="#context-processing-algorithm">Context Processing algorithm</a>
                 is discarded; it is called to detect errors at definition time.
-                If used, the context will be further processed as part of <a>expansion</a> or <a>compaction</a>.</p></li>
+                If used, the context will be re-processed and applied to the <a>active context</a>
+                as part of <a>expansion</a> or <a>compaction</a>.</p></li>
             <li>Set the <var>local context</var> of <var>definition</var> to <var>context</var>.</li>
           </ol>
         </li>