clang-format a line containing nothing but a "{". No behavior change.

llvm-svn: 235047
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 349b7b4..1cdc24e 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -1877,9 +1877,8 @@
 
 VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }
 
-VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition(
-  ASTContext &C) const
-{
+VarDecl::DefinitionKind
+VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
   // C++ [basic.def]p2:
   //   A declaration is a definition unless [...] it contains the 'extern'
   //   specifier or a linkage-specification and neither an initializer [...],