[clang] [emacs][clang-format] Add elisp API for clang-format on git diffs (PR #112792)

[via cfe-commits]

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@@ -205,14 +288,60 @@ uses the function `buffer-file-name'."
       (delete-file temp-file)
       (when (buffer-name temp-buffer) (kill-buffer temp-buffer)))))
 
+;;;###autoload
+(defun clang-format-git-diffs (&optional style assume-file-name)
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goldsteinn wrote:

The reason I chose `diffs` was to indicate it wasn't just the diff at point or something, but Ill rename `clang-format-vc-diff`

https://github.com/llvm/llvm-project/pull/112792