removed peculiar neg-operator -> harm tests running again

tests/funcs/test_harm_funcs.py

@@ -134,8 +134,8 @@ def test_harmSingleVarIntermediateFlagging(data, reshaper):
             raise NotImplementedError('untested test case')
 
         assert all(flagger[field].iloc[start:end] > UNFLAGGED)
-        assert all(~flagger[field].iloc[:start] == UNFLAGGED)
-        assert all(~flagger[field].iloc[end:] == UNFLAGGED)
+        assert all(flagger[field].iloc[:start] == UNFLAGGED)
+        assert all(flagger[field].iloc[end:] == UNFLAGGED)
 
     elif 'shift' in reshaper:
         if reshaper == "nshift":