Fix bugprone-argument-comment clang-tidy issues

Test: m tidy-art
Bug: 213953102
Change-Id: I5c703033db4fefd1cb3f1dd2dc95126930e28d53
diff --git a/runtime/class_loader_utils.h b/runtime/class_loader_utils.h
index 934c92b..c777370 100644
--- a/runtime/class_loader_utils.h
+++ b/runtime/class_loader_utils.h
@@ -177,7 +177,7 @@
   VisitClassLoaderDexFiles<decltype(helper), void*>(soa,
                                                     class_loader,
                                                     helper,
-                                                    /* default= */ nullptr);
+                                                    /* defaultReturn= */ nullptr);
 }
 
 }  // namespace art