Set default session parameter for HistoryManager.get_range()

IPython/core/history.py

@@ -396,7 +396,7 b' class HistoryManager(HistoryAccessor):'
                 line = input_hist[i]
             yield (0, i, line)
     
-    def get_range(self, session, start=1, stop=None, raw=True,output=False):
+    def get_range(self, session=0, start=1, stop=None, raw=True,output=False):
         """Retrieve input by session.
         
         Parameters