[clang] [clang][Sema] Emit more specific diagnostic for auto in lambda before C++14 (#46059) (PR #68540)

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cor3ntin wrote:

Thanks for this patch!

Our policy is to not mix functional changes and formatting changes.
Could you change the PR to have only the changes you made, wit no formatting change?
You can format your patch with `git clang-format` which only formats the lines that you changed.


https://github.com/llvm/llvm-project/pull/68540