Here is some Python code for a ``Dog``:

.. code-block:: python

    class Dog(Animal):
        def __init__(self, name):
            self.name = name

        def make_sound(self):
            print('Ruff!')

    dog = Dog('Fido')

and then here is some bash:

.. code-block:: bash

    if [ "$1" = "--help" ]; then
        echo "OK"
    fi

or click `SurveyMonkey <http://www.surveymonkey.com>`_


.. code-block:: abc

    An unknown code fence block
