Coauthors Generator
The Coauthors Generator is available on the web, so anyone can access it and easily get strings that conform to the co-author syntax. This is provided for people who cannot use other solutions or who prefer the web.
Colleagues on GitHub Add as co-author (opens in a new tab).
It's a great way to acknowledge the hard work of those helping you commit.
$ git commit -m "Refactor usability tests.
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Co-authored-by: NAME <NAME@EXAMPLE.COM>
Co-authored-by: ANOTHER-NAME <ANOTHER-NAME@EXAMPLE.COM>"