Small documentation and stylistic changes.

Test: art/test.py
Change-Id: Ibc74ee4783314266bf1d027811715058626c57c8
diff --git a/openjdkjvm/OpenjdkJvm.cc b/openjdkjvm/OpenjdkJvm.cc
index 3c87fe2..975d194 100644
--- a/openjdkjvm/OpenjdkJvm.cc
+++ b/openjdkjvm/OpenjdkJvm.cc
@@ -311,7 +311,7 @@
       LOG(INFO) << "Explicit GC skipped.";
       return;
   }
-  art::Runtime::Current()->GetHeap()->CollectGarbage(false);
+  art::Runtime::Current()->GetHeap()->CollectGarbage(/* clear_soft_references */ false);
 }
 
 JNIEXPORT __attribute__((noreturn)) void JVM_Exit(jint status) {