test for T736 fix

tests/run/argument_unpacking_closure_T736.py

+# mode: run
+# ticket: 736
+# tags: default arguments, closure
+
+def default_args_for_closure(a=1, b=2):
+    """
+    >>> default_args_for_closure()()
+    (1, 2)
+    >>> default_args_for_closure(1, 2)()
+    (1, 2)
+    >>> default_args_for_closure(2)()
+    (2, 2)
+    >>> default_args_for_closure(8,9)()
+    (8, 9)
+    >>> default_args_for_closure(7, b=6)()
+    (7, 6)
+    >>> default_args_for_closure(a=5, b=4)()
+    (5, 4)
+    >>> default_args_for_closure(b=5, a=6)()
+    (6, 5)
+    """
+    def func():
+        return a,b
+    return func