Commit 6aa349667974a521dbe0c7e0f543f9086156689d

Edward Thomson 2021-09-13T08:17:21

email: introduce `git_email_create_from_diff` Introduce a function to create an email from a diff and multiple inputs about the source of the diff. Creating an email from a diff requires many more inputs, and should be discouraged in favor of building directly from a commit, and is thus in the `sys` namespace.