diff --git a/docs/manual/CoreTasks/concat.html b/docs/manual/CoreTasks/concat.html
index 53ad16ea5..ac0ae8001 100644
--- a/docs/manual/CoreTasks/concat.html
+++ b/docs/manual/CoreTasks/concat.html
@@ -158,7 +158,7 @@ Resource Collection</a>s are used to
       <p>The concat task supports nested
         <a href="../CoreTypes/filterchain.html"> FilterChain</a>s.</p>
 
-      <h4>header,footer</h4>
+      <h4>header, footer</h4>
         <p><em>since Ant 1.6</em>.</p>
       <p>Used to prepend or postpend text into the concatenated stream.</p>
       <p>The text may be in-line or be in a file.</p>