[clang] [clang][nfc] Formatting fix for SubobjectAdjustment struct in Expr.h (PR #217803)

[Oliver Hunt via cfe-commits]

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@@ -60,51 +60,52 @@ namespace clang {
   class ValueDecl;
   class WarnUnusedResultAttr;
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ojhunt wrote:

Ah I see, I "fixed" the formatting by beating the section with bad formatting but didn't extend to the predeclarations. I've theoretically reformatted the rest.

https://github.com/llvm/llvm-project/pull/217803