Clearify the matching-rule

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@658558 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTypes/selectors.html

@@ -524,7 +524,7 @@
     <h4>Regular Expression Selector</h4>
 
     <p>The <code>&lt;containsregexp&gt;</code> tag in a FileSet limits
-    the files defined by that fileset to only those which contain a
+    the files defined by that fileset to only those which contents contain a
     match to the regular expression specified by the <code>expression</code> attribute.
     </p>
     <p>The <code>&lt;containsregexp&gt;</code> selector can be used as a