[llvm] [ADT] Fix formatting in FoldingSet.* (NFC) (PR #216591)

[Jakub Kuderski via llvm-commits]

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@@ -159,8 +154,9 @@ struct DefaultContextualFoldingSetTrait {
 };
 
 /// Like FoldingSetTrait, but for ContextualFoldingSets.
-template<typename T, typename Ctx> struct ContextualFoldingSetTrait
-  : public DefaultContextualFoldingSetTrait<T, Ctx> {};
+template <typename T, typename Ctx>
+struct ContextualFoldingSetTrait
+    : public DefaultContextualFoldingSetTrait<T, Ctx> {};
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kuhar wrote:

nit: the public here is redundant

https://github.com/llvm/llvm-project/pull/216591