[libcxx-commits] [libcxx] Fix __split_buffer_pointer_layout compatibility with swift's C++ interop (PR #170957)

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git-clang-format --diff origin/main HEAD --extensions  -- libcxx/include/__split_buffer --diff_from_common_commit
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``````````diff
diff --git a/libcxx/include/__split_buffer b/libcxx/include/__split_buffer
index 5355dbbff..c15e529a0 100644
--- a/libcxx/include/__split_buffer
+++ b/libcxx/include/__split_buffer
@@ -74,10 +74,11 @@ public:
   _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer_pointer_layout()
 #if _LIBCPP_STD_VER >= 20
       // Prevents Swift compiler's C++ importer from implicitly instantiating this ctor when it's not supported.
-      requires (!is_reference_v<allocator_type>)
+    requires(!is_reference_v<allocator_type>)
 #endif
-      : __back_cap_(nullptr) {}
-  
+      : __back_cap_(nullptr) {
+  }
+
   _LIBCPP_CONSTEXPR_SINCE_CXX20
   _LIBCPP_HIDE_FROM_ABI explicit __split_buffer_pointer_layout(const allocator_type& __alloc)
       : __back_cap_(nullptr), __alloc_(__alloc) {}

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https://github.com/llvm/llvm-project/pull/170957