Fix a typo and put emphasis on a magic “since Ant …” phrase

manual/Tasks/unzip.html

@@ -108,14 +108,14 @@ extract an Ant generated ZIP archive.</p>
       name before extracting it.  Note that this changes the entry name before
       applying <code>include</code>/<code>exclude</code> patterns and before using the nested
       mappers (if any).  <em>since Ant 1.8.0</em></td>
-    <td>No; defaults to <q>true</q> since 1.10.4
-      (used to defaukt to <q>false</q> prior to that)</td>
+    <td>No; defaults to <q>true</q> <em>since Ant 1.10.4</em>
+      (used to default to <q>false</q> prior to that)</td>
   </tr>
   <tr>
     <td>scanForUnicodeExtraFields</td>
     <td><strong>Note</strong>: This attribute is not available for the <code>untar</code> task.<br/>
       If the archive contains Unicode extra fields then use them to set the file names, ignoring the
-      specified encoding.  <br/>See also the <a href="zip.html#encoding">discussion in the zip task
+      specified encoding.<br/>See also the <a href="zip.html#encoding">discussion in the zip task
       page</a></td>
     <td>No; defaults to <q>true</q></td>
   </tr>