[#2838] fixing Sphinx error in ARM

diff --git a/doc/sphinx/arm/hooks.rst b/doc/sphinx/arm/hooks.rst
index e5e0df56df530ec15645c58128cb364ad6423ddb..99d4301bb7ea0072b2d8ab24f0b95c27b7729870 100644 (file)
--- a/doc/sphinx/arm/hooks.rst
+++ b/doc/sphinx/arm/hooks.rst
@@ -300,7 +300,7 @@ without the need to restart the server.
 
 The DDNS-Tuning Hook uses user-context to configure per subnet behavior. Example:
 
-.. code-block:: json
+::
 
     "subnet4": [{
         "subnet": "192.0.2.0/24",