print slot names correctly (i.e. keep casing)

Parser/spec/SlotPrinting.jadd

@@ -2,52 +2,52 @@ aspect Printing {
 
   public void SlotExpr.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
   }
 
   public void SlotIntLiteralConstant.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
   }
 
   public void SlotBlock.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
     s.lb();
   }
 
   public void SlotVariable.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
   }
 
   public void SlotDoConstruct.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
   }
 
   public void SlotExecutableConstruct.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
     s.lb();
   }
 
   public void SlotExecutionPartConstruct.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getSlotName());
+    s.literalAppend(getSlotName());
     s.append("#");
     s.lb();
   }
 
   public void SlotForName.prettyPrint(PrettyPrinter s) {
     s.append("#");
-    s.append(getString());
+    s.literalAppend(getString());
     s.append("#");
   }
 }