Update json_front_end.rst to use literal blocks

Author: christopher-wild

docs/source/json_front_end.rst

@@ -33,23 +33,17 @@ Each test requires:
 
 Run Commands
 ------------
-To run the JSON frontend example from the root directory of the project, use
-
-.. code-block:: console
+To run the JSON frontend example from the root directory of the project, use::
 
     python examples/poisson/run_causal_tests.py
 
-A failure flag `-f` can be specified to stop the framework running if a test is failed
-
-.. code-block:: console
+A failure flag `-f` can be specified to stop the framework running if a test is failed::
 
     python examples/poisson/run_causal_tests.py -f
 
 There are two main outputs of this frontend, both are controlled by the logging module. Firstly outputs are printed to stdout (terminal).
 Secondly a log file is produced, by default a file called `json_frontend.log` is produced in the directory the script is called from.
 
-The behaviour of where the log file is produced and named can be altered with the --log_path argument:
-
-.. code-block:: console
+The behaviour of where the log file is produced and named can be altered with the --log_path argument::
 
     python examples\poisson\run_causal_tests.py -f --data_path="examples\poisson\data.csv" --dag_path="examples\poisson\dag.dot" --json_path="examples\poisson\causal_tests.json --log_path="example_directory\logname.log"