added ~session/noline case to test_extract_hist_ranges()

- added ~10/ case, which is expected to yield (-10, 1, None)

IPython/core/tests/test_history.py

@@ -141,14 +141,15 b' def test_history():'
 
 
 def test_extract_hist_ranges():
-    instr = "1 2/3 ~4/5-6 ~4/7-~4/9 ~9/2-~7/5"
+    instr = "1 2/3 ~4/5-6 ~4/7-~4/9 ~9/2-~7/5 ~10/"
     expected = [(0, 1, 2),  # 0 == current session
                 (2, 3, 4),
                 (-4, 5, 7),
                 (-4, 7, 10),
                 (-9, 2, None),  # None == to end
                 (-8, 1, None),
-                (-7, 1, 6)]
+                (-7, 1, 6)
+                (-10, 1, None)]
     actual = list(extract_hist_ranges(instr))
     nt.assert_equal(actual, expected)