Cypclass multiple inheritance test: unittest docstring

nogil_test/cypclass_test_multiple_inheritance.pyx

+# mode: run
+# distutils: language=c++
+# distutils: extra_compile_args=-std=c++11
+# tag: cpp
+
 cdef cypclass A:
   int a
   void __init__(self, int arg=0):
@@ -25,6 +30,15 @@ cdef cypclass C(A,B):
     self.a = self.b = arg
 
 cpdef bag():
+  """
+  >>> bag()
+  3
+  4
+  8
+  1
+  8
+  1
+  """
   a = A(3)
   b = B(4)
   c = C(5)