diff --git a/docs/source/advanced/chain/chain_tasks.rst b/docs/source/advanced/chain/chain_tasks.rst
index 4c840ef5f..725752ae5 100644
--- a/docs/source/advanced/chain/chain_tasks.rst
+++ b/docs/source/advanced/chain/chain_tasks.rst
@@ -18,14 +18,14 @@ Currently only the ``bmcsetup`` command is officially supplied by xCAT to run to
     runimage=<URL>
 
 **URL** is a string which can be run by ``wget`` to download the image from the URL. The example could be: ::
-  
+
     runimage=http://<IP of xCAT Management Node>/<dir>/image.tgz
 
 The ``image.tgz`` **must** have the following properties:
   * Created using the ``tar zcvf`` command
   * The tarball must include a ``runme.sh`` script to initiate the execution of the runimage
 
-To create your own image, reference :ref:`creating image for runimage <create_image_for_runimage>`. 
+To create your own image, reference :ref:`creating image for runimage <create_image_for_runimage>`.
 
 **Tip**: You could try to run ``wget http://<IP of xCAT Management Node>/<dir>/image.tgz`` manually to make sure the path has been set correctly.
 
@@ -41,5 +41,5 @@ Causes the genesis kernel to create a shell for the administrator to log in and
 
 * standby
 
-Causes the genesis kernel to go into standby and wait for tasks from the chain. ... 
+Causes the genesis kernel to go into standby and wait for tasks from the chain. ...