Need example repo for week 3

[k8hertweck]

It would be good to have:

• examples of code
• changes that aren't committed (or not? revert?)
• a file that has been tracked further back in history that needs to be purged from log
• multiple branches to merge

[k8hertweck]

Two repos already in this org include:

• git_example_repo
• example_analysis_repo