[turbofan]: Fix double register output in traces

src/compiler/instruction.cc

Index: src/compiler/instruction.cc
diff --git a/src/compiler/instruction.cc b/src/compiler/instruction.cc
index a7ed0e5f236f7bae334f7810ee41efc80bcf624e..5f02f11efde297bfca8f266172353a37d5859568 100644
--- a/src/compiler/instruction.cc
+++ b/src/compiler/instruction.cc
@@ -119,7 +119,8 @@ std::ostream& operator<<(std::ostream& os,
              << "|R";
           break;
         case AllocatedOperand::DOUBLE_REGISTER:
-          os << "[" << DoubleRegisterOperand::cast(op).GetRegister().ToString()
+          os << "["
+             << DoubleRegisterOperand::cast(op).GetDoubleRegister().ToString()
              << "|R";
           break;
       }