Apply Kevin's suggestions, make branch-compare generation more robust

runtime/vm/il_printer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 
 namespace dart {
@@ skipping 168 matching lines @@
 void StrictCompareComp::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s, ", Token::Str(kind()));
   left()->PrintTo(f);
   f->Print(", ");
   right()->PrintTo(f);
 }
 
 
 void EqualityCompareComp::PrintOperandsTo(BufferFormatter* f) const {
   left()->PrintTo(f);
-  f->Print(" == ");
+  f->Print(" %s ", Token::Str(kind()));
   right()->PrintTo(f);
 }
 
 
 void StaticCallComp::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", String::Handle(function().name()).ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     f->Print(", ");
     ArgumentAt(i)->PrintTo(f);
   }
@@ skipping 526 matching lines @@
     if (i > 0) f->Print(", ");
     values_[i]->PrintTo(f);
     if ((i < locations_.length()) && !locations_[i].IsInvalid()) {
       f->Print(" [%s]", locations_[i].Name());
     }
   }
   f->Print(" }");
 }
 
 }  // namespace dart