fix tests

src/prolog/machine/machine_state_impl.rs

@@ -132,7 +132,9 @@ impl MachineState {
         output.append(" = ");
 
         let mut printer = HCPrinter::from_heap_locs(&self, output, var_dir);
+        
         printer.numbervars = false;
+        printer.quoted = true;
             
         let mut output = printer.print(addr);
 

src/prolog/machine/term_expansion.rs

@@ -126,6 +126,10 @@ impl MachineState {
         } else {
             let mut output  = {
                 let mut printer = HCPrinter::new(&self, PrinterOutputter::new());
+                
+                printer.quoted = true;
+                printer.numbervars = true;
+                
                 printer.print(Addr::HeapCell(h))
             };