Fix installpackage doc
-Install additional packages
-^^^^^^^^^^^^^^^^^^^^^^^^^^^
-If you are using Tellurium notebook or Tellurium Spyder, you can install additional package using ``installPackage`` function. In Tellurium Spyder, you can also install packages using included command Prompt. For more information, see `Running Command Prompt for Tellurium Spyder <https://tellurium.readthedocs.io/en/latest/walkthrough.html#running-command-prompt-for-tellurium-spyder>`_.
-.. autofunction:: tellurium.installPackage
+How to install additional packages
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are using Tellurium notebook or Tellurium Spyder, you can install additional package using ``installPackage`` function. In Tellurium Spyder, you can also install packages using included command Prompt. For more information, see `Running Command Prompt for Tellurium Spyder <https://tellurium.readthedocs.io/en/latest/walkthrough.html#running-command-prompt-for-tellurium-spyder>`_.
.. code-block:: python
