Document since Ant 1.7 for textfile attribute.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@358864 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/conditions.html

@@ -248,7 +248,7 @@ or the filenames match the answer is so obvious the detailed test is omitted.
     <td valign="top">textfile</td>
     <td valign="top">Whether to ignore line endings
         when comparing files; defaults to <i>false</i>, while
-        <i>true</i> bypasses the size comparison.
+        <i>true</i> bypasses the size comparison. <b>Since Ant 1.7</b>
     </td>
     <td align="center">No</td>
   </tr>