ART: Refactor for bugprone-argument-comment

Handles compiler.

Bug: 116054210
Test: WITH_TIDY=1 mmma art
Change-Id: I5cdfe73c31ac39144838a2736146b71de037425e
diff --git a/compiler/optimizing/ssa_phi_elimination.cc b/compiler/optimizing/ssa_phi_elimination.cc
index 5370f43..3fcb72e 100644
--- a/compiler/optimizing/ssa_phi_elimination.cc
+++ b/compiler/optimizing/ssa_phi_elimination.cc
@@ -141,7 +141,7 @@
 
   ArenaBitVector visited_phis_in_cycle(&allocator,
                                        graph_->GetCurrentInstructionId(),
-                                       /* expandable */ false,
+                                       /* expandable= */ false,
                                        kArenaAllocSsaPhiElimination);
   visited_phis_in_cycle.ClearAllBits();
   ScopedArenaVector<HPhi*> cycle_worklist(allocator.Adapter(kArenaAllocSsaPhiElimination));