[lld] [lld] NFC. Rename function to better reflect their implementation (PR #136625)

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github-actions[bot] wrote:

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: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 HEAD~1 HEAD --extensions cpp -- lld/ELF/ICF.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/lld/ELF/ICF.cpp b/lld/ELF/ICF.cpp
index fe18acc9b..79c145117 100644
--- a/lld/ELF/ICF.cpp
+++ b/lld/ELF/ICF.cpp
@@ -433,7 +433,8 @@ void ICF<ELFT>::forEachClassRange(size_t begin, size_t end,
 
 // Call Fn on each equivalence class.
 template <class ELFT>
-void ICF<ELFT>::parallelForEachClass(llvm::function_ref<void(size_t, size_t)> fn) {
+void ICF<ELFT>::parallelForEachClass(
+    llvm::function_ref<void(size_t, size_t)> fn) {
   // If threading is disabled or the number of sections are
   // too small to use threading, call Fn sequentially.
   if (parallel::strategy.ThreadsRequested == 1 || sections.size() < 1024) {

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https://github.com/llvm/llvm-project/pull/136625