fix typo

node_modules/ace/lib/ace/edit_session.js

@@ -148,7 +148,7 @@ var EditSession = function(text, mode) {
     this.$undoSelect = true;
 
     this.$foldData = [];
-    this.id = "session" + EditSession.$uid;
+    this.id = "session" + (++EditSession.$uid);
     this.$foldData.toString = function() {
         return this.join("\n");
     };