minor changes

Author: anutosh491

clang/lib/Interpreter/Interpreter.cpp

@@ -489,11 +489,13 @@ Interpreter::create(std::unique_ptr<CompilerInstance> CI,
     Interp->DeviceParser = std::move(DeviceParser);
   }
 
-  // Add runtime code and set a marker to hide it from user code.
+  // Add runtime code and set a marker to hide it from user code. Undo will not
+  // go through that.
   auto PTU = Interp->Parse(Runtimes);
   if (!PTU)
     return PTU.takeError();
   Interp->markUserCodeStart();
+
   Interp->ValuePrintingInfo.resize(4);
   return std::move(Interp);
 }