ART: Refactor for bugprone-argument-comment

Handles runtime.

Bug: 116054210
Test: WITH_TIDY=1 mmma art
Change-Id: Ibc0d5086809d647f0ce4df5452eb84442d27ecf0
diff --git a/runtime/mirror/class.cc b/runtime/mirror/class.cc
index 26dba02..6a378f0 100644
--- a/runtime/mirror/class.cc
+++ b/runtime/mirror/class.cc
@@ -83,7 +83,7 @@
     Thread* self = Thread::Current();
     if (name == nullptr) {
       // Note: ThrowNullPointerException() requires a message which we deliberately want to omit.
-      self->ThrowNewException("Ljava/lang/NullPointerException;", /* msg */ nullptr);
+      self->ThrowNewException("Ljava/lang/NullPointerException;", /* msg= */ nullptr);
     } else {
       self->ThrowNewException("Ljava/lang/ClassNotFoundException;", name->ToModifiedUtf8().c_str());
     }