return transformed cursor value

www/common/text-cursor.js

@@ -3,6 +3,7 @@ define([
     var module = { exports: {} };
     var transformCursor = function (cursor, op) {
         if (!op) { return cursor; }
+
         var pos = op.offset;
         var remove = op.toRemove;
         var insert = op.toInsert.length;
@@ -17,10 +18,12 @@ define([
     };
     module.exports.transformCursor = function (cursor, ops) {
         if (Array.isArray(ops)) {
-            for (var i = ops.length - 1; i >= 0; i--) { transformCursor(cursor, ops[i]); }
+            for (var i = ops.length - 1; i >= 0; i--) {
-            return;
+                cursor = transformCursor(cursor, ops[i]);
+            }
+            return cursor;
         }
-        transformCursor(ops);
+        return transformCursor(ops);
     };
     return module.exports;
-});
+});