[clang] [clang] Fix a dangling reference in clang/utils/TableGen/ClangDiagnosticsEmitter.cpp (PR #119197)

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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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git-clang-format --diff f9d6d46a8edfac7421a4b010eb216f793669bef1 85f1d54459125568bfbe2088827040c3b05a7804 --extensions cpp -- clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
index f7a6807a14..a9faba0d84 100644
--- a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
+++ b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
@@ -1907,8 +1907,7 @@ void clang::EmitClangDiagDocs(const RecordKeeper &Records, raw_ostream &OS) {
   // Write out the diagnostic groups.
   for (const Record *G : DiagGroups) {
     bool IsRemarkGroup = isRemarkGroup(G, DiagsInGroup);
-    auto &GroupInfo =
-        DiagsInGroup[G->getValueAsString("GroupName")];
+    auto &GroupInfo = DiagsInGroup[G->getValueAsString("GroupName")];
     bool IsSynonym = GroupInfo.DiagsInGroup.empty() &&
                      GroupInfo.SubGroups.size() == 1;
 

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https://github.com/llvm/llvm-project/pull/119197