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))
             };
 

src/tests.rs

@@ -1871,7 +1871,7 @@ fn test_queries_on_dcgs()
 
     submit(&mut wam, ":- use_module(library(dcgs)).");
     
-    // test case by YeGoblynQueene on hacker news.
+    // test case by YeGoblynQueene from hacker news.
     compile_user_module(&mut wam,
     " ability(destroy, X) --> destroy(X).
       destroy(X) --> [destroy], target(X).