Minor cleanup to Background: Jupyter page.

docs/Background-Jupyter.md

 # Background: Jupyter
 
 [Jupyter](https://jupyter.org) is a fantastic tool for writing code with 
-embedded visualizations. We provide one such notebook, `python/Basics.ipynb`, for 
-testing the Python control interface to a Unity build. This notebook is introduced in the 
-[Getting Started with the 3D Balance Ball Environment](Getting-Started-with-Balance-Ball.md),
-but can be used for testing any environment build.
+embedded visualizations. We provide one such notebook, `python/Basics.ipynb`, 
+for testing the Python control interface to a Unity build. This notebook is 
+introduced in the 
+[Getting Started with the 3D Balance Ball Environment](Getting-Started-with-Balance-Ball.md)
+tutorial, but can be used for testing the connection to any Unity build.
 
 For a walkthrough of how to use Jupyter, see
 [Running the Jupyter Notebook](http://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html)