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Support Co-Authored-By #373
Github introduced a convention where the commit message contains a list of co-authors, for use when pairing.
Both Github and Atom then displays both authors whenever they are showing author information. See http://blog.atom.io/2018/04/18/atom-1-26.html#github-package-improvements-1 for an example of what it looks like in Atom.
While I could provide a command or menu that (in theory) could add the co-author into the Source Control input, I couldn't make it nice and integrated like Atom. For that to happen vscode would need to add this feature into the Git extension itself. I will think about it some more, but I would recommend you request this feature on the vscode repo as well.