Formatted Doc text

Formmated contents of Read the docs text
Change-Id: I44ebf3894f55ad72c35600f263b58a3235880af4
Issue-ID: CCSDK-1453
Signed-off-by: Ezhilarasi <ezhrajam@in.ibm.com>
diff --git a/docs/datadictionary/sourcedefaultcode.rst b/docs/datadictionary/sourcedefaultcode.rst
index 243f87f..89c5c2c 100644
--- a/docs/datadictionary/sourcedefaultcode.rst
+++ b/docs/datadictionary/sourcedefaultcode.rst
@@ -5,9 +5,10 @@
 Source Default code
 ===================
 
-{
-  "description": "This is Default Resource Source Node Type",
-  "version": "1.0.0",
-  "properties": {},
-  "derived_from": "tosca.nodes.ResourceSource"
-}
\ No newline at end of file
+.. code-block:: json
+   :linenos:
+
+   "description": "This is Default Resource Source Node Type",
+   "version": "1.0.0",
+   "properties": {},
+   "derived_from": "tosca.nodes.ResourceSource"