Add tests to snippet for stepped string slicing
@@ -8,3 +8,8 @@ assert "on" == word[4:]
assert "on" == word[-2:]
assert "Py" == word[:-4]
# assert "Py" == word[::2]
+
+assert "Pto" == word[::2]
+assert "yhn" == word[1::2]
+assert "Pt" == word[:4:2]
+assert "yh" == word[1:4:2]
