Fixed again the tricky list syntax

Author: javiereguiluz

contributing/documentation/overview.rst

@@ -267,9 +267,9 @@ these steps:
 #. Install `pip`_ as explained in the `pip installation`_ article.
 
 #. Install `Sphinx`_ and `Sphinx Extensions for PHP and Symfony`_
-  (depending on your system, you may need to execute this command as root user):
+   (depending on your system, you may need to execute this command as root user):
 
-  .. code-block:: bash
+   .. code-block:: bash
 
         $ pip install sphinx~=1.3.0 git+https://github.com/fabpot/sphinx-php.git