What did Atlassian use to create their Git tutorial?

[saad khalid]

I think the layout for the Git tutorial is gorgeous. I've been doing some volunteer work with the open source project, Sage Math, and I would like make their documentation as lovely the Git tutorial here, hopefully that will make computational math more accessible for people who are trying to get started. The format looks a bit similar to readthedocs.org, so I wasn't sure if Atlassian was using something similar to that. If so, or if you have any tips, I'd love to know! Thanks!

[saad khalid]

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