[clang] [clang][dataflow] Fix u8 string error with C++20. (PR #84302)

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github-actions[bot] wrote:

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


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

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You can test this locally with the following command:
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``````````bash
git-clang-format --diff 5830d1a2dff24d752459f215a0c8fc366f393596 66ba3d492bc09b1244d1b0abdee58e1015a19974 -- clang/lib/Analysis/FlowSensitive/HTMLLogger.cpp
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<details>
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Analysis/FlowSensitive/HTMLLogger.cpp b/clang/lib/Analysis/FlowSensitive/HTMLLogger.cpp
index f2753d962f..6afd66d9dc 100644
--- a/clang/lib/Analysis/FlowSensitive/HTMLLogger.cpp
+++ b/clang/lib/Analysis/FlowSensitive/HTMLLogger.cpp
@@ -500,7 +500,7 @@ private:
     for (unsigned I = 0; I < CFG.getNumBlockIDs(); ++I) {
       std::string Name = blockID(I);
       // Rightwards arrow, vertical line
-      const char *ConvergenceMarker = (const char*)u8"\\n\u2192\u007c";
+      const char *ConvergenceMarker = (const char *)u8"\\n\u2192\u007c";
       if (BlockConverged[I])
         Name += ConvergenceMarker;
       GraphS << "  " << blockID(I) << " [id=" << blockID(I) << " label=\""

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https://github.com/llvm/llvm-project/pull/84302