Replace NULL with nullptr

Also fixed some lines that were too long, and a few other minor
details.

Change-Id: I6efba5fb6e03eb5d0a300fddb2a75bf8e2f175cb
diff --git a/runtime/verifier/method_verifier_test.cc b/runtime/verifier/method_verifier_test.cc
index f67adc1..3994536 100644
--- a/runtime/verifier/method_verifier_test.cc
+++ b/runtime/verifier/method_verifier_test.cc
@@ -31,7 +31,7 @@
  protected:
   void VerifyClass(const std::string& descriptor)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
-    ASSERT_TRUE(descriptor != NULL);
+    ASSERT_TRUE(descriptor != nullptr);
     Thread* self = Thread::Current();
     mirror::Class* klass = class_linker_->FindSystemClass(self, descriptor.c_str());