Re-enable pickling for some Cython modules, the control flow graph needs it for deep copying.

(Although that seems a bug – deep copying should probably just keep the control flow graph intact.)

Cython/Compiler/FlowControl.py

 # cython: language_level=3str
+# cython: auto_pickle=True
 
 from __future__ import absolute_import
 

Cython/Plex/DFA.pxd

-# cython:
+# cython: auto_pickle=False
 
 cimport cython
 

Cython/Plex/Machines.py

+# cython: auto_pickle=False
 """
 Python Lexical Analyser
 

Cython/Plex/Transitions.py

+# cython: auto_pickle=False
 """
 Plex - Transition Maps
 

setup.py

@@ -163,7 +163,6 @@ def compile_cython_modules(profile=False, compile_more=False, cython_with_refnan
         language_level=2,
         binding=False,
         always_allow_keywords=False,
-        auto_pickle=False,
         autotestdict=False,
     )
     if profile: