Cypclass test distutil & doctest: __new__

nogil_test/cypclass_test___new__.pyx

+# mode: run
+# distutils: language=c++
+# distutils: extra_compile_args=-std=c++11
+# tag: cpp
+
 # This is extremely hacky
 cdef extern from "Python.h":
   struct CyObject "CyObject"
@@ -71,4 +76,11 @@ cdef double baa():
   return o
 
 cpdef bag():
+  """
+  >>> bag()
+  -1
+  3
+  32
+  6.8
+  """
   return str(foo()) + '\n' + str(bar()) + '\n' + str(baz()) + '\n' + str(baa())