[clang-tools-extra] Clang doc async (PR #93276)

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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 2287f8d2353dadcbe210e07776c927c9fabca57c 0fa00f0a6064dd0ab42dfd0863ebdcf90daa1742 -- clang-tools-extra/clang-doc/HTMLGenerator.cpp clang-tools-extra/clang-doc/Representation.h clang-tools-extra/clang-doc/Serialize.cpp clang-tools-extra/clang-doc/tool/ClangDocMain.cpp
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-doc/HTMLGenerator.cpp b/clang-tools-extra/clang-doc/HTMLGenerator.cpp
index fd3807014f..fb1a7f94c9 100644
--- a/clang-tools-extra/clang-doc/HTMLGenerator.cpp
+++ b/clang-tools-extra/clang-doc/HTMLGenerator.cpp
@@ -1047,9 +1047,8 @@ static llvm::Error CopyFile(StringRef FilePath, StringRef OutDirectory) {
   std::error_code FileErr = llvm::sys::fs::copy_file(PathRead, PathWrite);
   if (FileErr != OK) {
     return llvm::createStringError(llvm::inconvertibleErrorCode(),
-                                   "error creating file " +
-                                       FilePath +
-                                       ": " + FileErr.message() + "\n");
+                                   "error creating file " + FilePath + ": " +
+                                       FileErr.message() + "\n");
   }
   return llvm::Error::success();
 }
diff --git a/clang-tools-extra/clang-doc/Serialize.cpp b/clang-tools-extra/clang-doc/Serialize.cpp
index 49062af637..3b074d849e 100644
--- a/clang-tools-extra/clang-doc/Serialize.cpp
+++ b/clang-tools-extra/clang-doc/Serialize.cpp
@@ -32,7 +32,6 @@ populateParentNamespaces(llvm::SmallVector<Reference, 4> &Namespaces,
 
 static void populateMemberTypeInfo(MemberTypeInfo &I, const FieldDecl *D);
 
-
 // A function to extract the appropriate relative path for a given info's
 // documentation. The path returned is a composite of the parent namespaces.
 //
diff --git a/clang-tools-extra/clang-doc/tool/ClangDocMain.cpp b/clang-tools-extra/clang-doc/tool/ClangDocMain.cpp
index af892b5402..53108a77da 100644
--- a/clang-tools-extra/clang-doc/tool/ClangDocMain.cpp
+++ b/clang-tools-extra/clang-doc/tool/ClangDocMain.cpp
@@ -156,8 +156,8 @@ Example usage for a project using a compile commands database:
   }
 
   // add option to customize url fragment
-  // such as https://github.com/llvm/llvm-project/blob/main/clang-tools-extra/clang-doc/ClangDocMain.cpp#L1
-
+  // such as
+  // https://github.com/llvm/llvm-project/blob/main/clang-tools-extra/clang-doc/ClangDocMain.cpp#L1
 
   // Fail early if an invalid format was provided.
   std::string Format = getFormatString();
@@ -205,7 +205,6 @@ Example usage for a project using a compile commands database:
     CDCtx.FilesToCopy.emplace_back(IndexJS.str());
   }
 
-
   // Mapping phase
   llvm::outs() << "Mapping decls...\n";
   auto Err =

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https://github.com/llvm/llvm-project/pull/93276