DOC: fix error in generated RST code
@@ -36,7 +36,7 @@ Some may seem fairly complicated at first glance, but they are built by combinin
Many draw upon sample datasets compiled by the `Vega <https://vega.github.io/vega/>`_ project. To access them yourself, install `vega_datasets <https://github.com/altair-viz/vega_datasets>`_.
-.. code-block::
+.. code-block:: none
$ pip install vega_datasets
