Add test and fix for fromkeys() optional argument.
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index e6e0ba6..f528ad8 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -293,6 +293,9 @@
self.assertEqual(sum(elem.hash_count for elem in d), n)
d3 = dict.fromkeys(frozenset(d))
self.assertEqual(sum(elem.hash_count for elem in d), n)
+ d3 = dict.fromkeys(frozenset(d), 123)
+ self.assertEqual(sum(elem.hash_count for elem in d), n)
+ self.assertEqual(d3, dict.fromkeys(d, 123))
class TestSet(TestJointOps):
thetype = set