[clang] [Sema] Avoid excessive desuraging in template deduction (PR #100144)

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


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``````````bash
git-clang-format --diff 363e036ac002d5af4bb82e303052b806a98086a1 20c9e54bc2e30864592b74db6ed1eeeddeacca50 --extensions cpp -- clang/test/SemaTemplate/variadic-no-mention.cpp clang/lib/Sema/SemaTemplateDeduction.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaTemplateDeduction.cpp b/clang/lib/Sema/SemaTemplateDeduction.cpp
index 7fc595bd60..71529a822b 100644
--- a/clang/lib/Sema/SemaTemplateDeduction.cpp
+++ b/clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -948,7 +948,7 @@ private:
 
     // Skip over the pack elements that were expanded into separate arguments.
     // If we partially expanded, this is the number of partial arguments.
-    if (IsPartiallyExpanded)  {
+    if (IsPartiallyExpanded) {
       PackElements += NumPartialPackArgs;
     } else if (IsExpanded) {
       assert(FixedNumExpansions.has_value());

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https://github.com/llvm/llvm-project/pull/100144