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

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goldsteinn wrote:

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> Works well on Linux, generally seems fine although I still think it's worth considering splitting out "getting-changes" into a separate shared code-base to avoid dealing with details of calling diff for different version control system here.

Think lukel97 also tested on MacOS.

I see where you're coming from regarding the split, although still feel quite strongly that features that don't make it into the mainline project have a high risk of becoming derelict.

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