Issue #2335: Backport set literals syntax from Python 3.x.
diff --git a/Lib/test/test_compiler.py b/Lib/test/test_compiler.py
index 24930f8..8d4a3a99 100644
--- a/Lib/test/test_compiler.py
+++ b/Lib/test/test_compiler.py
@@ -248,6 +248,7 @@
 l[3:4]
 d = {'a': 2}
 d = {}
+s = {1}
 t = ()
 t = (1, 2)
 l = []