nbgitpuller

[pancakereport]

https://curriculum-guide.datahub.berkeley.edu/support/troubleshooting/nbgitpuller/#modified-content

https://nbgitpuller.readthedocs.io/en/latest/topic/automatic-merging.html

additional option: copy of assignment with name "-updated" or "-final" or "-new" or whatever

@ericvd-ucb feel free to add comments