style(docs): style cleanup

Author: Matthew Fisher

docs/managing_deis/upgrading-deis.rst

@@ -152,19 +152,28 @@ Once all applications have been validated, the old cluster can be retired.
 Upgrading CoreOS
 ----------------
 
-Sometimes you may need to update CoreOS manually in order to get Deis to work. You can do this by ssh'ing onto your servers and running the following commands:
+Sometimes you may need to update CoreOS manually in order to get Deis to work. You can do this by
+running the following commands:
 
-    sudo /usr/bin/systemctl unmask update-engine.service
-    sudo /usr/bin/systemctl start update-engine.service
-    sudo update_engine_client -update
-    sudo /usr/bin/systemctl stop update-engine.service
-    sudo /usr/bin/systemctl mask update-engine.service
-    sudo reboot
+.. code-block:: console
+
+    $ ssh core@<server ip>
+    $ sudo su
+    $ systemctl unmask update-engine.service
+    $ systemctl start update-engine.service
+    $ update_engine_client -update
+    $ systemctl stop update-engine.service
+    $ systemctl mask update-engine.service
+    $ reboot
 
 You can check the CoreOS version by running the following command on the CoreOS machine:
 
-    cat /etc/os-release
+.. code-block:: console
+
+    $ cat /etc/os-release
 
 Or from your local machine:
 
-    ssh core@<server ip> 'cat /etc/os-release'
+.. code-block:: console
+
+    $ ssh core@<server ip> 'cat /etc/os-release'