s/appliedRules/visitedRules/

The rules are not really *applied* by the |reportLeftRecursion| pass,
they are just *visited*.

lib/compiler/passes/report-left-recursion.js

@@ -59,28 +59,28 @@ function reportLeftRecursion(ast) {
   });
 
   var check = visitor.build({
-    rule: function(node, appliedRules) {
-      check(node.expression, appliedRules.concat(node.name));
+    rule: function(node, visitedRules) {
+      check(node.expression, visitedRules.concat(node.name));
     },
 
-    sequence: function(node, appliedRules) {
+    sequence: function(node, visitedRules) {
       arrays.every(node.elements, function(element) {
         if (element.type === "rule_ref") {
-          check(element, appliedRules);
+          check(element, visitedRules);
         }
 
         return matchesEmpty(element);
       });
     },
 
-    rule_ref: function(node, appliedRules) {
-      if (arrays.contains(appliedRules, node.name)) {
+    rule_ref: function(node, visitedRules) {
+      if (arrays.contains(visitedRules, node.name)) {
         throw new GrammarError(
           "Left recursion detected for rule \"" + node.name + "\"."
         );
       }
 
-      check(asts.findRule(ast, node.name), appliedRules);
+      check(asts.findRule(ast, node.name), visitedRules);
     }
   });