Fix frozenset pprint test

Author: wjandrea

pandas/tests/io/formats/test_printing.py

@@ -83,7 +83,7 @@ def test_repr_mapping(self):
         assert printing.pprint_thing(MyMapping()) == "{'a': 4, 'b': 4}"
 
     def test_repr_frozenset(self):
-        assert printing.pprint_thing(frozenset([1, 2])) == "frozenset(1, 2)"
+        assert printing.pprint_thing(frozenset([1, 2])) == "frozenset({1, 2})"
 
 
 class TestFormatBase: