Reduce verbosity of hydrogen instructions with OSEs.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 54889f096e1585b3e75b04581ee71156a4e9dc4b..36d1e11edab37c49aea9aa725866799eb28b83c6 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -802,13 +802,13 @@ void HValue::ComputeInitialRange(Zone* zone) {
 
 void HInstruction::PrintTo(StringStream* stream) {
   PrintMnemonicTo(stream);
-  const char* side_effects =
-      CheckFlag(HValue::kHasNoObservableSideEffects) ? "-" : "+";
-  stream->Add("ose%s ", side_effects);
   PrintDataTo(stream);
   PrintRangeTo(stream);
   PrintChangesTo(stream);
   PrintTypeTo(stream);
+  if (CheckFlag(HValue::kHasNoObservableSideEffects)) {
+    stream->Add(" [noOSE]");
+  }
 }