Update on @ulupo feedback

Co-authored-by: Umberto Lupo <[email protected]>

gph/test/test_ripser.py

@@ -191,7 +191,7 @@ def test_multithread_consistent(dm):
             assert_almost_equal(res[0][dim], res[i][dim])
 
 
-def test_cocycles_in_persistance_pair():
+def test_cocycles_in_persistence_pair():
     """Test for a simple cocycle in a persistence pair
        The data and the results are taken from cocycles notebook of
        ripser.py package"""