Save answer based on history

common/lib/xmodule/xmodule/open_ended_module.py

@@ -532,7 +532,11 @@ class OpenEndedModule():
             return self.out_of_sync_error(get)
 
         # add new history element with answer and empty score and hint.
-        self.new_history_entry(get['student_answer'])
+        if(len(self.history)>0):
+            if(len(self.history[-1].keys())>1):
+                self.new_history_entry(get['student_answer'])
+            else:
+                get['student_answer']=self.latest_answer()
         self.get_score(get['student_answer'], system)
         self.change_state(self.ASSESSING)
 
@@ -632,7 +636,6 @@ class OpenEndedModule():
             'allow_reset': self._allow_reset(),
             'rows' : 30,
             'cols' : 80,
-            'hidden' : '',
             'id' : 'open_ended',
             'msg' : self.latest_feedback(),
             'child_type' : 'openended',