[CentralOH] How To Show Incremental Changes Between Cells in Jupyter Notebook?

[jep200404 at columbus.rr.com]

I need a better way to show differences between Jupyter Notebook cells
to show incremental improvements while refactoring.
What better ways can you think of?
How would you do it?

I have been refactoring in Jupyter Notebook for others to learn from.
I start with some small code in a cell,
copy it into a new cell and change something.
There are many small changes, so there are many cells.
When looking back, it would be nice to see what the differences are
without relying on one's eyeballs to notice all the changes.

Explore:
http://nbviewer.jupyter.org/url/colug.net/python/dojo/20160429/dojo-20160429-2016-Mar-COhPy_Challenge_Rough-20160507-2148.ipynb

Something that is not mentioned in the bottom cell
is that it would be nice for it to work in MS Windows
and Apple as well as Linux.