[llvm-mca] Fix RegisterFile debug prints. NFC

llvm-svn: 336367
diff --git a/llvm/tools/llvm-mca/Instruction.cpp b/llvm/tools/llvm-mca/Instruction.cpp
index c8eb63f..dbf2d5f 100644
--- a/llvm/tools/llvm-mca/Instruction.cpp
+++ b/llvm/tools/llvm-mca/Instruction.cpp
@@ -94,10 +94,11 @@
 #ifndef NDEBUG
 void WriteState::dump() const {
   dbgs() << "{ OpIdx=" << WD.OpIndex << ", Lat=" << WD.Latency << ", RegID "
-         << getRegisterID() << ", Cycles Left=" << getCyclesLeft() << " }\n";
+         << getRegisterID() << ", Cycles Left=" << getCyclesLeft() << " }";
 }
 
 void WriteRef::dump() const {
+  dbgs() << "IID=" << getSourceIndex() << ' ';
   if (isValid())
     getWriteState()->dump();
   else