What is the difference between 'git format-patch and 'git diff'?

A patch created with git format-patch will also include some meta-information about the commit (committer, date, commit message, ...) and will contains diff of binary data. Everything will be formatted as a mail, so that it can be easily sent. The person that receive it can then recreate the corresponding commit with git am and all meta-data will be intact.

It can also be applied with git apply as it is a super-set of a simple diff.

From the manuals git-format-patch prepares patches suitable for email submission, while git-diff shows changes.

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