[clang] Fixes and closes #53952. Setting the ASTHasCompilerErrors member variable correctly based on the PP diagnostics. (PR #68127)

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git-clang-format --diff 0701ee69f7ac82b49a9709e610227ebf387f1d30 b76f4d351b3e55e2095e3be088a50fdb76d6b7f9 -- clang/lib/Serialization/ASTWriter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 35f37de9b185..0d75dbbbad8f 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -4628,11 +4628,12 @@ ASTFileSignature ASTWriter::WriteAST(Sema &SemaRef, StringRef OutputFile,
   WritingAST = true;
 
   ASTHasCompilerErrors = hasErrors;
-  bool trueHasErrors = SemaRef.PP.getDiagnostics().hasUncompilableErrorOccurred();
+  bool trueHasErrors =
+      SemaRef.PP.getDiagnostics().hasUncompilableErrorOccurred();
   assert(ASTHasCompilerErrors == trueHasErrors);
   if (trueHasErrors != ASTHasCompilerErrors) {
-      // forcing the compiler errors flag to be set correctly
-      ASTHasCompilerErrors = trueHasErrors;
+    // forcing the compiler errors flag to be set correctly
+    ASTHasCompilerErrors = trueHasErrors;
   }
 
   // Emit the file header.

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https://github.com/llvm/llvm-project/pull/68127