[PATCH] D93701: [clang][cli] NFC: Make Diags optional in normalizer

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith added a comment.

> This is needed for a future patch, where we start using normalizers in contexts where no Diags are available.

Can you explain what those contexts are? I'm wondering if they can be changed to create a `DiagnosticsEngine` instead of having to account for it being maybe missing in all these places.


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https://reviews.llvm.org/D93701