[clang] [clang] Fix handling of constexpr static data member template. (PR #220469)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang/lib/AST/Decl.cpp clang/test/CodeGenCXX/cxx1z-inline-variables.cpp clang/test/SemaTemplate/class-template-spec.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index a0670a3c8..34f5d0abe 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -2258,8 +2258,7 @@ VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
   // a static data member template outside the containing class?
   if (isStaticDataMember()) {
     if (isOutOfLine() &&
-        !(getCanonicalDecl()->isInline() &&
-          getCanonicalDecl()->isConstexpr() &&
+        !(getCanonicalDecl()->isInline() && getCanonicalDecl()->isConstexpr() &&
           !getCanonicalDecl()->isOutOfLine()) &&
         (hasInit() ||
          // If the first declaration is out-of-line, this may be an

``````````

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https://github.com/llvm/llvm-project/pull/220469