[clang] [clang][ASTImporter] Improve import of variable template specializations. (PR #78284)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 289999bad76e34441a3a43f4bf32e028b43fad93 41393908cb142f5b863a7a4203d89a57c5ce4bc1 -- clang/lib/AST/ASTImporter.cpp clang/lib/AST/ASTStructuralEquivalence.cpp clang/unittests/AST/ASTImporterGenericRedeclTest.cpp clang/unittests/AST/ASTImporterTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/ASTStructuralEquivalence.cpp b/clang/lib/AST/ASTStructuralEquivalence.cpp
index bd4e0b3fa3..d677fdc863 100644
--- a/clang/lib/AST/ASTStructuralEquivalence.cpp
+++ b/clang/lib/AST/ASTStructuralEquivalence.cpp
@@ -1330,8 +1330,7 @@ static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
   // Compare storage class and initializer only if none or both are a
   // definition. Like a forward-declaration matches a class definition, variable
   // declarations that are not definitions should match with the definitions.
-  if (D1->isThisDeclarationADefinition() !=
-      D2->isThisDeclarationADefinition())
+  if (D1->isThisDeclarationADefinition() != D2->isThisDeclarationADefinition())
     return true;
 
   if (D1->getStorageClass() != D2->getStorageClass())

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https://github.com/llvm/llvm-project/pull/78284