Bug #1520864: unpacking singleton tuples in for loop (for x, in) work again.
diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py
index 4bb4e45..f160867 100644
--- a/Lib/test/test_grammar.py
+++ b/Lib/test/test_grammar.py
@@ -531,6 +531,11 @@
for x in Squares(10): n = n+x
if n != 285: raise TestFailed, 'for over growing sequence'
+result = []
+for x, in [(1,), (2,), (3,)]:
+ result.append(x)
+vereq(result, [1, 2, 3])
+
print 'try_stmt'
### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite]
### | 'try' ':' suite 'finally' ':' suite