Minor change to Readme to test codecov integration.

README.rst

@@ -69,15 +69,15 @@ You can run Mesa in a Docker container in a few ways.
 If you are a Mesa developer, first `install docker-compose <https://docs.docker.com/compose/install/>`_ and then run:
 
 .. code-block:: bash
-    
+
     $ docker-compose build --pull
     ...
     $ docker-compose up -d dev # start the docker container
     $ docker-compose exec dev bash # enter the docker container that has your current version of Mesa installed at /opt/mesa
     $ mesa runserver examples/Schelling # or any other example model in examples
 
 
-The docker-compose file does two important things: 
+The docker-compose file does two important things:
 
 * It binds the docker container's port 8521 to your host system's port 8521 so you can interact with the running model as usual by visiting localhost:8521 on your browser
 * It mounts the mesa root directory (relative to the docker-compose.yml file) into /opt/mesa and runs pip install -e on that directory so your changes to mesa should be reflected in the running container.