Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/runtime/exception_test.cc b/runtime/exception_test.cc
index 54341e3..a7a6d46 100644
--- a/runtime/exception_test.cc
+++ b/runtime/exception_test.cc
@@ -217,7 +217,7 @@
   EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());
 
 #if !defined(ART_USE_PORTABLE_COMPILER)
-  thread->SetTopOfStack(NULL, 0); // Disarm the assertion that no code is running when we detach.
+  thread->SetTopOfStack(NULL, 0);  // Disarm the assertion that no code is running when we detach.
 #else
   thread->PopShadowFrame();
   thread->PopShadowFrame();