strip trailing \n for history lines

IPython/core/history.py

@@ -210,8 +210,8 b' class HistoryManager(object):'
         # do not store quit/exit commands
         if source_raw in ['Quit', 'quit', 'Exit', 'exit', '%Quit', '%quit', '%Exit', '%exit']:
             return
-        self.input_hist_parsed.append(source)
-        self.input_hist_raw.append(source_raw)
+        self.input_hist_parsed.append(source.rstrip())
+        self.input_hist_raw.append(source_raw.rstrip())
         self.shadow_hist.add(source)
 
         # update the auto _i variables

IPython/frontend/qt/console/ipython_widget.py

@@ -170,7 +170,7 b' class IPythonWidget(FrontendWidget):'
         input_history_dict = {}
         for key,val in history_dict.items():
             input_history_dict[int(key)] = val
-        items = [ val for _, val in sorted(input_history_dict.items()) ]
+        items = [ val.rstrip() for _, val in sorted(input_history_dict.items()) ]
         self._set_history(items)
 
     def _handle_pyout(self, msg):