spelling: sentinel

tests/test-simplemerge.py

@@ -138,7 +138,7 b' class TestMerge3(TestCase):'
                     ['aaa', 'bbb', 'zz'],
                     ['zz'])
 
-        # todo: should use a sentinal at end as from get_matching_blocks
+        # todo: should use a sentinel at end as from get_matching_blocks
         # to match without zz
         self.assertEquals(list(m3.find_sync_regions()),
                           [(0, 1,  2, 3,  0, 1),
@@ -156,7 +156,7 b' class TestMerge3(TestCase):'
         m3 = Merge3([],
                     ['aaa', 'bbb'],
                     [])
-        # todo: should use a sentinal at end as from get_matching_blocks
+        # todo: should use a sentinel at end as from get_matching_blocks
         # to match without zz
         self.assertEquals(list(m3.find_sync_regions()),
                           [(0, 0,  2, 2,  0, 0)])