docs: fix code markup
use a correct highlighter
ensure that the code is not parsed as RST code-block options
@@ -113,7 +113,8 @@ fully-functional programs.
**Note**: *Examples should be run from the examples/ folder.*
-.. code-block:: shell
+.. code-block:: shell-session
+
$ pwd
/path/to/oopt-gnpy
$ cd examples
@@ -126,7 +127,7 @@ You can specify a different network at the command line as follows. For
example, to use the CORONET Global network defined in
`examples/CORONET_Global_Topology.json <examples/CORONET_Global_Topology.json>`_:
-.. code-block:: shell
+.. code-block:: shell-session
$ cd examples
$ python transmission_main_example.py CORONET_Global_Topology.json
