Fix bug.

app/controllers/asks_controller.rb

@@ -475,7 +475,7 @@ class AsksController < ApplicationController
                       old_input = old_.find('input, select');
                   if(new_input.length != 0 && old_input.length != 0){
                     if(new_input.length == old_input.length){
-                      old__.clone().replaceAll(new);
+                      old_.clone().replaceAll(new_);
                     }
                   }
                 }